Hello, I have an RTX 3060 Ti also. I play at 1080p currently with V-Sync on at 50% of refresh rate, with preset on High. Airports seem to drop frames anyway if they are large/busy. I’ve searched around and I believe it’s just how it is currently. Most other places I will get 37 FPS which is fine for this game.
That’s just for the card only but the rest of your spec looks good. I should add I have it on DX11, so maybe try that too.