Hi from Spain
For my 2021 TRX, when ordering the vehicIe from the dealer I optioned a factory only option called XFQ "Trailer camera wiring", they somehow messed up and the vehicle didn't get built with the ordered option. So I ended up looking up online how to add this option & getting the MOPAR retrofit kit which basically does the same as XFQ, "Dual Trailer Camera Vehicle Wiring Prep Kit 82216274AC", consists of a plug and play wiring kit and bracket with camera connector that fits below the rear bumper & all the way to the front to the Uconnect system. It comes with detailed installation instructions. The dealer has to add option XFQ to your VIN with the FCA Wi-Tech software, once this is done, the Uconnect Aux camera 1 & 2 are no longer greyed out & work as expected.
2021 Ram 1500 Dual Trailer Camera Vehicle Wiring Prep Kit 82216274AC
store.mopar.com
The compatible camera kit is p/n 82216068AD
2020-2022 Ram Dual Camera Trailer Kit 82216068AD
store.mopar.com
I had the kit installed at a local FCA dealer and works as expected, camera image quality is acceptable (barely) but the kit is convenient.