I turned my Xbox back to 120hz and definitely see an increase in clarity (as expected). In Theory it should offer a better refresh rate to games that take advantage of 120hz but I don’t think (correct me if I’m wrong) MSFS does. Pretty sure I read somewhere that it’s fixed at 60fps
So the only benefit will be an increase in clarity/detail.
Edit: looks like I was wrong and MSFS does run at 120fps on Xbox. Series X runs @ 1440p and Series S @ 1080p
If I remember why I had stopped using 120hz, I was getting the odd flickering in game. But I’ve had it turned off now since SU6. So, maybe time to try again.