Ive never had any kick back with the 1095A policy number, Ive left it blank and its never been an issue.

Ive never entered an actual 1099NEC and Ive never had a client get a letter about it either, as long as total income reported meets or exceeds what was reported on the 1099NECs, its never been an issue.  Only EINs on W2s and 1099Rs get cross matched.