Unpack forces all optional args

Tried to use this method to type my kwargs:
https://github.com/microsoft/pylance-release/issues/2541#issuecomment-1448576066

it produced some mypy bug:
https://github.com/microsoft/pylance-release/issues/2541#issuecomment-2517421890

I also opened a bug for pylance:
https://github.com/microsoft/pylance-release/issues/6732#issue-2717774122