It just happened to me since a week ago and found this discussion here and did what been told here and the nfc still not working on my iphone 12. tried reboot several times and still not working. Tried to remember what i did before the nfc not wroking and then i remebered that week ago i activated the air drop to transfer some pucture to my friend, so it still active then i disable it.. and finally.. the nfc is working like before 😬😬 glad to find it. Then i tried to activate the air drop again.. and the nfc still active. Is it a bug ?