You can not use a plastic female fitting. Whatever you screw into it, will split it. Any inspector will make you take it out.
Which is the nicest thing possible they can do.
You will be taking it out at some point, usually after it has ruined your floors.
Sharkbites will work as transistions between
copper x PEX
copper x CPVC
PEX x CPVC
Did I miss any?
Oh Yeah, Female copper Female Adapter x CPVC Male adapter. "added Sunday morning"
Female copper adapter x PEX male.
I like running copper to the valve, at least enough so I can strap it to something.