It's not mypy issue. Comparing to TS python typehints (spec wise) are a joke. It's started as bolted on adhoc solution and evolved quite chaotically. For example [1]. TS doesn't require a special decorator (sic!) to make your custom classes to be picked up by type checkers.
Or how make a wrapper function with args and kwargs to pass through?
The dataclass decorator isn't there to make the type checkers understand the class. Its main purpose is to automatically implement trivial methods like the constructor, equality, repr, etc. The type hints make this more convenient, but something similar already existed with attrs.
Or how make a wrapper function with args and kwargs to pass through?
[1]: https://docs.python.org/3/library/typing.html#typing.datacla...