In general, any map that doesn't have a custom progs.dat will be compatible.
A good starting point is to visit https://www.quaddicted.com/reviews/, sort by rating, and check if the map you're looking at doesn't have a custom progs.dat. There is an icon towards the bottom of each map's page that will tell you. Also, the map should not have any "dependency".
For maps with .pak: extracting any .pak to the Id1 folder is the recommended way to install custom maps, but you can also rename the XX in .pakXX to some unique number which comes before the Quake VR .pak files and after the regular Quake ones.
If you try any of the maps below, please let me know if they work and we can list them under "confirmed working".
- https://www.quaddicted.com/reviews/ac.html
- https://www.quaddicted.com/reviews/bindingtower2.html
- https://www.quaddicted.com/reviews/could.html
- https://www.quaddicted.com/reviews/czg03.html
- https://www.quaddicted.com/reviews/czgtoxic.html
- https://www.quaddicted.com/reviews/digs05.html
- https://www.quaddicted.com/reviews/dm6rmx.html
- https://www.quaddicted.com/reviews/drearydisposition.html
- https://www.quaddicted.com/reviews/e1m1rmx.html
- https://www.quaddicted.com/reviews/endofsolace.html
- https://www.quaddicted.com/reviews/explorejam1.html
- https://www.quaddicted.com/reviews/fmb_bdg2.html
- https://www.quaddicted.com/reviews/func_mapjam2.html
- https://www.quaddicted.com/reviews/gmsp3tw.html
- https://www.quaddicted.com/reviews/gotshun-never-released_levels.html (requires Scourge of Armagon)
- https://www.quaddicted.com/reviews/grim_rezipped.html
- https://www.quaddicted.com/reviews/ivory1b.html
- https://www.quaddicted.com/reviews/ksp1.html
- https://www.quaddicted.com/reviews/mapjam6.html
- https://www.quaddicted.com/reviews/megad2lvl3.html
- https://www.quaddicted.com/reviews/menk.html
- https://www.quaddicted.com/reviews/nastrond.html
- https://www.quaddicted.com/reviews/qump.html
- https://www.quaddicted.com/reviews/quoffee.html
- https://www.quaddicted.com/reviews/retrojam2.html
- https://www.quaddicted.com/reviews/retrojam3.html
- https://www.quaddicted.com/reviews/retrojam3dlc.html
- https://www.quaddicted.com/reviews/retrojam4dlc_pulsar.html
- https://www.quaddicted.com/reviews/simplex.html
- https://www.quaddicted.com/reviews/sm185_pack.html
- https://www.quaddicted.com/reviews/sm82.html
- https://www.quaddicted.com/reviews/tofaz.html
- https://www.quaddicted.com/reviews/uwjam.html
- https://www.quaddicted.com/reviews/winbbcoh.html
- https://www.quaddicted.com/reviews/zendar1d.html