Looking at your EGT gauge the engine must be running very rich.
Otherwise you should see much higher temperatures in the exhaust gas.
There is of course no carb icing in a fuel injected engine, but there is induction icing….which also restricts air flow to the engine and will cause it to run rich.
At those temps and elevation the mixture in real life would certainly be full rich on the ground for run up and takeoff….but in FS you also have to lean the Cessna quite aggressively even just 2000’ up.
So I would try again full power and then lean until the rpm drops further and watch rpm and egt as you slowly do that.