diff --git a/scripts/cxx-api/parser/builders.py b/scripts/cxx-api/parser/builders.py
index 85d11f7ccc63..4dbd7466596f 100644
--- a/scripts/cxx-api/parser/builders.py
+++ b/scripts/cxx-api/parser/builders.py
@@ -337,6 +337,16 @@ def get_property_member(
     is_readable = getattr(member_def, "readable", "no") == "yes"
     is_writable = getattr(member_def, "writable", "no") == "yes"
 
+    # Handle block properties: Doxygen splits the block type across <type> and <argsstring>
+    # <type> = "void(^"
+    # <argsstring> = ")(NSString *eventName, NSDictionary *event, NSNumber *reactTag)"
+    # We need to combine them: "void(^eventInterceptor)(NSString *, NSDictionary *, NSNumber *)"
+    if property_type.endswith("(^"):
+        argsstring = member_def.get_argsstring()
+        if argsstring:
+            property_type = f"{property_type}{property_name}{argsstring}"
+            property_name = ""
+
     return PropertyMember(
         property_name,
         property_type,
@@ -465,7 +475,24 @@ def create_interface_scope(
 
     interface_scope = snapshot.create_interface(interface_name)
     base_classes = get_base_classes(scope_def, base_class=InterfaceScopeKind.Base)
-    interface_scope.kind.add_base(base_classes)
+
+    # Doxygen incorrectly splits "Foo <Protocol1, Protocol2>" into separate base classes:
+    # "Foo", "<Protocol1>", "<Protocol2>". Combine them back into "Foo <Protocol1, Protocol2>".
+    combined_bases = []
+    for base in base_classes:
+        if base.name.startswith("<") and base.name.endswith(">") and combined_bases:
+            prev_name = combined_bases[-1].name
+            protocol = base.name[1:-1]  # Strip < and >
+            if "<" in prev_name and prev_name.endswith(">"):
+                # Previous base already has protocols, merge inside the brackets
+                combined_bases[-1].name = f"{prev_name[:-1]}, {protocol}>"
+            else:
+                # First protocol for this base class
+                combined_bases[-1].name = f"{prev_name} <{protocol}>"
+        else:
+            combined_bases.append(base)
+
+    interface_scope.kind.add_base(combined_bases)
     interface_scope.location = scope_def.location.file
 
     _process_objc_sections(
diff --git a/scripts/cxx-api/parser/member.py b/scripts/cxx-api/parser/member.py
index 407fa078aecf..2069aa80a84e 100644
--- a/scripts/cxx-api/parser/member.py
+++ b/scripts/cxx-api/parser/member.py
@@ -404,7 +404,11 @@ def to_string(
         if self.is_static:
             result += "static "
 
-        result += f"@property {attrs_str}{self.type} {name};"
+        # For block properties, name is embedded in the type (e.g., "void(^eventInterceptor)(args)")
+        if name:
+            result += f"@property {attrs_str}{self.type} {name};"
+        else:
+            result += f"@property {attrs_str}{self.type};"
 
         return result
 
diff --git a/scripts/cxx-api/tests/snapshots/should_handle_class_with_generic_inheritance/snapshot.api b/scripts/cxx-api/tests/snapshots/should_handle_class_with_generic_inheritance/snapshot.api
new file mode 100644
index 000000000000..e10fec618c71
--- /dev/null
+++ b/scripts/cxx-api/tests/snapshots/should_handle_class_with_generic_inheritance/snapshot.api
@@ -0,0 +1,3 @@
+interface RCTAppearance : public RCTEventEmitter <RCTBridgeModule> {
+  public virtual instancetype init();
+}
diff --git a/scripts/cxx-api/tests/snapshots/should_handle_class_with_generic_inheritance/test.h b/scripts/cxx-api/tests/snapshots/should_handle_class_with_generic_inheritance/test.h
new file mode 100644
index 000000000000..dc261f9b5083
--- /dev/null
+++ b/scripts/cxx-api/tests/snapshots/should_handle_class_with_generic_inheritance/test.h
@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#pragma once
+
+namespace test {
+
+@interface RCTAppearance : RCTEventEmitter <RCTBridgeModule>
+- (instancetype)init;
+@end
+
+} // namespace test
diff --git a/scripts/cxx-api/tests/snapshots/should_handle_class_with_multiple_protocol_conformances/snapshot.api b/scripts/cxx-api/tests/snapshots/should_handle_class_with_multiple_protocol_conformances/snapshot.api
new file mode 100644
index 000000000000..f66dd58f6c0e
--- /dev/null
+++ b/scripts/cxx-api/tests/snapshots/should_handle_class_with_multiple_protocol_conformances/snapshot.api
@@ -0,0 +1,2 @@
+interface RCTAlertManager : public NSObject <RCTBridgeModule, RCTInvalidating> {
+}
diff --git a/scripts/cxx-api/tests/snapshots/should_handle_class_with_multiple_protocol_conformances/test.h b/scripts/cxx-api/tests/snapshots/should_handle_class_with_multiple_protocol_conformances/test.h
new file mode 100644
index 000000000000..02d7e217d22b
--- /dev/null
+++ b/scripts/cxx-api/tests/snapshots/should_handle_class_with_multiple_protocol_conformances/test.h
@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#pragma once
+
+namespace test {
+
+@interface RCTAlertManager : NSObject <RCTBridgeModule, RCTInvalidating>
+
+@end
+
+} // namespace test
diff --git a/scripts/cxx-api/tests/snapshots/should_handle_interface_with_block_property/snapshot.api b/scripts/cxx-api/tests/snapshots/should_handle_interface_with_block_property/snapshot.api
new file mode 100644
index 000000000000..01e1b9d3f9cc
--- /dev/null
+++ b/scripts/cxx-api/tests/snapshots/should_handle_interface_with_block_property/snapshot.api
@@ -0,0 +1,5 @@
+interface RCTInterfaceWithBlockProperty : public NSObject {
+  public @property (copy) NSString *(^blockWithReturn)(int value);
+  public @property (copy) void(^eventInterceptor)(NSString *eventName, NSDictionary *event, NSNumber *reactTag);
+  public @property (copy) void(^simpleBlock)(void);
+}
diff --git a/scripts/cxx-api/tests/snapshots/should_handle_interface_with_block_property/test.h b/scripts/cxx-api/tests/snapshots/should_handle_interface_with_block_property/test.h
new file mode 100644
index 000000000000..e9fc1c8b9658
--- /dev/null
+++ b/scripts/cxx-api/tests/snapshots/should_handle_interface_with_block_property/test.h
@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+@interface RCTInterfaceWithBlockProperty : NSObject
+
+@property (nonatomic, copy, nullable) void (^eventInterceptor)
+    (NSString *eventName, NSDictionary *event, NSNumber *reactTag);
+@property (nonatomic, copy) void (^simpleBlock)(void);
+@property (nonatomic, copy) NSString * (^blockWithReturn)(int value);
+
+@end