UPDATE : I remember right after updating to 15.4 beta i troed the NFC and it works. I also use the NFC after that and it still works. Right now I want to tap my card and it’s back to failed to read. So yeah here I am again. My NFC not working on ios 15.6 Really hope apple fixed this.

UPDATE guys after updating to ios 15.5 public beta 2 my NFC finally back! Try to update yours. Good luck.