I've had problems zapping Primal Wallet users. I think connecting your own wallet via NWC is a better option. I don't really like the idea of an integrated wallet.
Discussion
I used to have Alby NWC. I got Coinos and it is much easier. But I also use and love my #primal native wallet for zapping.
See, I just connected my Coinos wallet to Primal via NWC for sending zaps.