Looks like work fine with python3.7

[codeskyblue]

tested in Mac, it looks fine.

[ferstar]

Me too
Use Python 3.7.7(compile from source by pyenv tool)

PYTHON_CONFIGURE_OPTS="--enable-shared" CFLAGS="-I$(brew --prefix openssl)/include" LDFLAGS="-L$(brew --prefix openssl)/lib" pyenv install 3.7.7

works fine with fbs.

[ChetanAmrao]

how to use it for later PyQt5 versions? like PyQt5==5.15.4