Some casual testing here suggests that maya 2022+ may be disabling separate userSetups in modules but the xxx_load.py method still works. Not sure how to interpret this but worth knowing.
Moreover the xxx_load.py mehod bypasses the userSetup checksum test: In this example I changed both a userSetup.py (which did not actually execute!) and a xxx_load.py (which did) and the security message only caught the first:
