What are your FPS when it’s jerky?
You can see that by using Oculus Debug Tool and display Performance on the HUD. And I bet you will see spikes and loss of fps.
It’s jerky in the cockpit because it uses more resources than with outside view.
I barely reach 36-40fps with a lot of settings on Low/Medium with a 5800x and a 3090 RTX so with this setup, don’t expect anything good.
It’s like saying my car won’t reach 300km/h when you’re driving a golf cart.
I can reproduce the exact same issue on Eurotruck Simulator 2 for example: looking around is smooth, panning the view is jerky. It’s not an issue with MSFS, your computer is just not powerful enough. (and yes the game is not VR optimized yet, still, they can’t make miracles)
Added to the fact that since we cannot reach 72fps (the bare minimum for a smooth experience), you either block the fps to 36 without ASW, or use ASW to recreate missing frames. In both ways, it’ll be jerky because you run at 36fps instead of 72.
There is nothing to fix because there is no bug, that’s how the headset works.
It seems that Steam Motion Smoothing gives better results. But it’s only for SteamVR headsets.