NFC antenna does not work

Hi, I’ve had this issue going onto a year now. It started from when I took out the logic board the first time to swap the charging port.

Everything else works except the nfc antenna and the back camera. I’m unable to use wallet to pay for stuff and my back camera doesn’t work.

After about a year my housing breaks so I swap the housing with a preowned one from eBay. Zero brackets missing yet the problem persists. I don’t know much about how the antenna works but I do know that it has something to do with some screws. Perhaps I’ve mixed a couple up?

I did lose the screw under the WiFi antenna that is unthreaded partially. I replaced it with spare screw that fits snug. Maybe that’s causing it? But then again it was screwed in on the previous housing and the issue remained.

Any helps much appreciated. Thank you.