I use Kelowna a bit, and this one is pretty decent.
https://flightsim.to/file/1257/airport-cylw-kelowna
For MSFS performance and a 2080 I’ve found that the following helped
- Nvidia 457.30 as past that causes judders unfortunately
- HAGS off
- The settings in here
I would tweak them to maybe 100 MSFS render resolution and then 65% on the custom resolution for OpenXR.