.popover(isPresented:content:) — a small piece of content floated next to a view while a bound flag is true.

Shape

Unlike .sheet (screen-level, picked up by RenderSheetsAndAlerts), a popover is anchored to a specific view, so it uses the wrapper-node structure from contextMenu rather than the hidden-screen-child one: a Popover node whose children are [anchor…, body…], with anchorCount splitting them. The body is resolved only while presented. The interpreter renders the anchor and, when presented, a Compose Popup (focusable, elevated Surface bubble) offset just below it, whose onDismissRequest writes the bound flag back — so tapping off the bubble dismisses, and the popover's own buttons can dismiss by setting the binding false.

Verification

• swift test — new test, 117 passing: collapsed emits the anchor only with no body resolved; presenting adds the body as a second child; and the dismiss callback flips isPresented back to false (dropping the body again).
• Emulator (new "Popover" screen), screenshot-checked: tapping "Show details" floated an anchored card ("Quick details" + text + "Got it"). The second example round-trips a choice — tapping "Choose" opened only that popover (independent bindings), and picking "Option A" set "Picked: A" and dismissed the bubble.

Scope

The plain isPresented form; no popover(item:), no attachmentAnchor/arrowEdge positioning (the bubble anchors top-start below the view). On a phone SwiftUI itself often falls back to a sheet — this always shows the floating bubble.