Apps in general can use the phone’s NFC hardware if that’s what you’re asking. But they can’t authenticate to the payment networks unless they have special credentials like Google pay. And they will generally detect whether your phone has been rooted, which gets in the way of degoogling. If you really want to degoogle, you have to root your phone.
I just don’t understand why NFC is better than a credit card. Cards support contactless payment these days, so you just tap against the card terminal. My phone has NFC and I have some ideas for it, but am fine using a credit card for card payments.