I have the problem on my phone and this option was already turned off. Didn't fix the issue for me
Plug an Xbox Series X controller into the phone via a USB-C cable. (I've heard reports that no USB controllers work)
I have the same problem, got an Xbox Series X controller and OnePlus 7T and was considering getting a clamp for it but it will not work over wired...
I'm having the same issue with my OnePlus 7T on 10.0.15