QNetworkAccessManager crashes when instantiated on macOS 11 (Big Sur)

As the title says, a Qt 6.5 app that instantiates QNetworkAccessManager crashes when run on macOS 11, despite Qt 6.5.3 tools & versions saying that macOS 11 is supported.

It appears that macOS 11 has openSSL 2.8.3 whilst the tools and versions says that Qt 6.5.3 needs at least 3.0.7. (macOS 12 and newer has openSSL >= 3.0.7.)

Should the tools and versions page be changed to indicate support for macOS 12 and greater? Or is there another solution, like manually packaging openSSL in a Qt 6.5.3 app? For years I've never had to manually package openSSL on my macOS builds.