Chosen Solution
I am very clumsy with my phone and drop it from time to time. I ended up braking my bluetooth hardware (chip?) and I am wondering what I need to fix/replace to get my bluetooth back.
iPhone 7 are very sensitive to drop at the Wifi/BT chip. The likely case is that you have a pulled pad under the wifi/bt chip on one of the pads responsible for bt signaling. These are often repairable, but it is a microsoldering surgery not a DIY fix. See if you can find a local microsolderer or mail in repair service that recognizes this common problem and who is willing to take on lifting the chip, patching the torn pad, then reballing and reinstalling the chip.
