Mine started doing that on day 2, and then the XM and Nav died, and the screen would constantly flash and reboot. It took me opening a case with Jeep and my dealer opening a STAR case with corp engineers to get them to release the part and finally get it shipped and installed THREE MONTHS later. Now my Nav is back, XM works but they deleted the subscription, and wireless carplay still doesn't work, but wired carplay works on my iPhone 12 but not my wife's.
They might get it all figured out in a few years, but it's just a mess for now, apparently.
Bottom line, you need to get the guts of the system replaced probably (not the screen). In my case, when it went dark, I could sometimes toggle the headlights on and off and the screen would come back (it was not actually completely off, but was just so dim that it looked like it was off).
Good luck.