I'd say what the Python policy says for modules also applies here: https://www.debian.org/doc/packaging-manuals/python-policy/index.html#dependencies
Specificically, dependencies on versioned Python runtime packages are forbidden. As I see it, uwsgi-plugin-python3 needs to build a versioned package against all supported Python versions, and build a meta-package depending on the current default Python version. A less elaborate fix would be adding a dependency on python3 (>= 3.11~), which would prevent migration to testing before the default Python in testing being changed.
