At the Virtual Desktop menu after connecting launch steamvr allow it to load. Then press the menu buttion on your left Quest 2 controller.
It’ll bring up your SteamVR dashboard. You’ll need to select the settings cogwheel (lower ight hand corner of SteamVR Dashboard.
From there you can change your resolution setting via the General section and toggle Auto off. You can then use the slider to increase/decrease the resolution that will be applied to your Q2 when playing MSFS2020. Mine was set at 150% and I dialed it back to 100% to use in MSFS2020. I have a RTX 3080 so I had no problem running at this resolution to obtain 24-30FPS at low altitude in MSFS 2020.
