Can confirm. The steam gauge C172 is a non-starter. G1000 version works fine.
If you are using the C172 Classic (steam gauges), see existing report:
First and second flight on a new installation of MSFS 2024 with no mods or addons. MSFS 2020 is also installed on this PC.
Cessna 172 Skyhawk does not have functioning electrical systems. Could not start engines after following startup checklist and current gauge indicates 0 regardless of lights or fuel pump. Lights, fuel pump, and starter are also non-functional.
When starting a new flight in the air, the engine is running but most avionics are not functional and no lights nor avonics (except…
I was able to start up the steam gauge 172 from cold and dark and fly two separates flights with it tonight. The AP didn’t work on the first flight, but did on the second one.