Seems like p2pk - pay to public key may be working or not in modern wallet apps. Is it still working or not?

The same about SIGHASH_SINGLE - is there any Python library that supports this hash type? And is there app which supports it?

Seems like p2pk - pay to public key may be working or not in modern wallet apps. Is it still working or not?

EDIT: Can old p2pk addresses be used to move balance to new addresses (for example bc1q...)?

The same about SIGHASH_SINGLE - is there any Python library that supports this hash type today?

EDIT: And is there wallet app which supports it currently?