Python type aliases without typing module TypeError: 'type' object is not subscriptable

Question

I was previously using from typing import Dict, List etc. but saw https://docs.python.org/3/library/typing.html give example type aliases as

ConnectionOptions = dict[str, str] Address = tuple[str, int] Server = tuple[Address, ConnectionOptions]

When I tried in my own code

MyType = list[tuple[int, list[int]]]

I got

TypeError: 'type' object is not subscriptable

Is it still not possible to use lowercase type names for typehints? If it is, how can I successfully do it?