kwargs typings are broken

With Python 3.10

Following this issue:
https://github.com/microsoft/pylance-release/issues/2541#issuecomment-1448576066

I tried to use it, and got 2 bugs:
https://github.com/microsoft/pylance-release/issues/2541#issuecomment-2517421890

I also opened a bug for mypy:
https://github.com/python/mypy/issues/18243#issue-2717780646