Hi Mark, FS4 is super efficient so I think your setup is more than ok for flying in VR. Maybe a little more ram could be good for an easy upgrading of your PC. I fly in VR in FS4 with Meta Quest 3, using the higher params and it works great.
This is my pc setup: Intel i7 14700KF - RTX 4070 12GB - Gigabyte Z790 - 32GB RAM - SSD M.2 - Windows 11 - Meta Quest 3. In VR, FS4 works much better to me than the other sims.