Prima 1216 may be self fertile but you’ll have better pollination grafting another variety into that tree, unless you want to add a second pawpaw. If you want a second tree, see if you can track down one of Jerry Lehman’s selections. Maria’s Joy might be a good fit. Or Allegheny from Neal Peterson is a good one too.
I’d recommend this persimmon if you have room. Hybrid persimmon Dar Sofiyivky