iPhone xs rear camera lens assy replacement, just lens not an option

Ok guys, have to change out the rear camera whole lens assy. How do I do that? Changing out just the lens is not an option. I think I need to pull out the bracket that holds the rear cameras but not really seeing a way to accomplish that. Plus I already have to change the power button, flash, and prox sensor cable so I’m already in the area, have the cameras out but cannot see how that bracket comes out. Or if I can just get the lens assy off without removing that bracket, that would be good too. Thanks