Unfortunately, we do not currently (4/14/23) have any brake controllers that have a harness available for your 2023 Jeep Grand Cherokee 4xe Overland.
To use a brake controller like the Redarc Tow-Pro Liberty Brake Controller # RED24FR, you would need to use the Universal Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers # RED69FR. view full answer...