Welcome to MSFS2020!
The FPS you’re getting sounds about right, however you might be able to optimise your settings to get more out of the sim.
This guide is a very in-depth explanation about how each setting affects performance, by how much, and whether they affect CPU or GPU load.
If you go through it while using MSFS’ inbuilt Dev-mode FPS counter, you’ll be able to see whether you’re mainthread (CPU) or GPU limited, and whether you can even turn some settings up as well as down and get better overall performance! 