type annotated arguments in zip function lead to wrong return types when using the star operator

This issue is a followup to the following issue:
https://github.com/microsoft/pylance-release/issues/3598

Here's the code that is wrongly annotated:

test_list: list[tuple[int, str]] = [(1, 'testa'), (2, 'testb')]

a: tuple[int]
b: tuple[str]

a, b = zip(*test_list)

Pylance warns about an assignment of typle[int | str] to the tuples a and b.
The tuple annotation is being converted to an Iterator annotation, which does not support a sequence of types (see Eric's reply to the previous issue for details). Therefore, the resulting tuples after the unpacking operation are not as precisely typed as they could be.

And here is the typeshed code that leads to the 'wrong' type annotations:

https://github.com/python/typeshed/blob/7b3fff714a48f0413141ba10344f9473e3ec4a18/stdlib/builtins.pyi#L1673-L1715

I'm not sure if it is currently possible to fix this. I had the idea of adding a type hint to the *args keyword, so something like this:

@overload
        def __new__(cls, __iter1: _T2:=Sequence[_T1], *args: _T2, strict: bool = ...) -> zip[tuple[_T1]]: 

I'm unsure if this is valid python syntax and if it would result in the desired behavior. I'm also unsure how python would decide between the proposed constructor and the one that is currently being used during typechecking my example:
https://github.com/python/typeshed/blob/7b3fff714a48f0413141ba10344f9473e3ec4a18/stdlib/builtins.pyi#L1675-L1676

Commencez par reproduire l’exemple annoté de zip(*test_list) et lisez les surcharges de zip dans stdlib/builtins.pyi autour des lignes 1673-1715. Consultez l’issue typeshed liée et l’ancienne issue Pylance avant d’évaluer une modification des surcharges. C’est terminé lorsque les variables déballées sont inférées comme tuple[int] et tuple[str], sans avertissements d’affectation.