I have been looking into adding wireless charging to a 2020 LT Trail Boss. It took a little digging and found the factory components on gmpartsdirect.com. The total cost is $108, and here are the required part #'s.
#84482763 Wiring Harness (w/o rear heated seats)
#84505586 Upper Trim Panel
#84002462 Wireless Charging Module
The only thing I'm not 100% is whether or not there would be any firmware requirements, or if it is a simple plug and play situation.