I am a licensed mobile AC tech.
That said, I have never messed with the newest stuff. I only got my license so I could buy R12 for my 65 Cuda. Recently, as in weekend before last, fixed the AC in a friend Toyota, R134 system. A couple of issues with it, the fresh air vent under the hood was almost all the way blocked with leaves and pine needles. The cabin air filter was probably original to the car and well pluggeed. The system was maybe 6 oz low on freon. Works fine now. I suggest looking at those items as well as the blend air door. I know there was/is an issue with Mopar blend air doors breaking and that is what controls the temperature. Not sure when, or if, they ever sorted that out. Had to fix that on on the old lady's 05 Ram.
Another thing to check, does the compressor turn on when you request AC? If so you have freon in the system, might be low though. One tube going in the cab should get cold, the other one hot. If that is happening then it's probably a blend air door issue. However, without gauges on the system and pressure readings, need ambient temperature too, it's a guessing game.