iPhone 16 Pro Max(s) won’t charge!

I got my first iPhone 16 pro max a few months ago, woke up one day after a night of charging, and it was on 12 percent. It was complete unresponsive to mag charging and cable charging (certified cable, 20W block). I went to the Apple Store and they couldnt identify the issue so they just replaced the phone entirely, I am still experiencing the same issue with the replacement. I even bought a new cable and block despite the old one working perfectly fine for my iPad. Please help, I dont think the Genius Bar knows what the problem is.