Some ``:meth:`` markups are not being hyperlinked at all, while some are. This only occurs for Python 3.10. This also seems related to https://bugs.python.org/issue42042.

Eg. 
For 3.9, https://docs.python.org/3.9/library/stdtypes.html#truth-value-testing:
``__bool__``, ``__len__`` are hyperlinked.

For 3.10, https://docs.python.org/3.10/library/stdtypes.html#truth-value-testing:
``__bool__``, ``__len__`` are not hyperlinked.

This occurs throughout the documentation, but it doesn't seem to consistently happen. For example, in https://docs.python.org/3.10/library/stdtypes.html#contextmanager.__exit__ , ``__exit__`` is hyperlinked, but right below that section, the other ``__exit__``s are not. This is puzzling since their markup both uses the same :meth:`__exit__`.

I'm not able to locally reproduce this using Sphinx 2.4.0. I don't know which version exactly of Sphinx this regression occured.