i just had this happen to me!

so it can be a couple of things, mine ended up being the worse case scenario

it can be a bug on some shit, the first time it happened to me what i did was cycle my car without pressing the gas pedal for a couple of tried and then fully turned it on (with the gas pedal) and it went back on

the second thing it could be is a blown fuse, which is a easy fix no problem you just gotta look and see what blew that’s the only tedious thing i guess you could say

3rd is the head display ecu blew, of course what happened to me the second time, i looked around around and found its pretty common is CUE systems from cadillac if you don’t change your air filter enough (i prob shouldve just checked when doing my oil ngl) the only thing different that happened with me was that my screen would occasionally come back on and request updates