Chosen Solution

My iPhone X screen had been cracked and unresponsive. I replaced the screen, everything appeared to be working besides the wifi and bluetooth connectivity. I then replaced the wifi/bluetooth antenna to see if this would fix the issue. Unfortunately the issue was not fixed and the wifi is still greyed out and bluetooth still does not work. Ive reset the network settings as well as the entire device,

This would be a board issue. Even with no antenna’s the Wi-Fi should not be greyed out. The two possibilities would be the Wi-Fi IC has failed due to cracked or oxidised solder balls or the interposer board connecting the top and bottom layer has suffered the same due to an impact of some kind. You will need a microsolderer to fix this issue.

Which one of these did you replace ?