PEP-585 typing changes
https://www.python.org/dev/peps/pep-0585/
PEP-0585 made some (welcome) changes to typing, it would be good it pypy could support this - I guess this is a 3.9 thing ?
In short: Lots of things that used to require something like typing.List can now accept the actual type, e.g. list Many other typing annotations were moved to simplify things for the developer.