Upon further testing, I found that I don’t need the NVIDIA drivers to be installed if I disable the GPU with udev rules to get hardware acceleration working on the iGPU.
To sum it up:
System: Intel i7-9750H and NVIDIA GTX 1650, tested on Fedora and Ubuntu, Plex Desktop Flatpak and Snap
| Variables | NVIDIA Driver*1 | GPU Card status*2 | Working?*3 |
|---|---|---|---|
| Case A | installed | enabled | yes |
| Case B | installed | disabled | yes |
| Case C | uninstalled | enabled | no |
| Case D | uninstalled | disabled | yes |
*1 NVIDIA Driver includes packages egl-gbm and egl-wayland
*2 Disabled GPU card means using the udev rule according to here, enabled means the absence of the udev rule
*3 Checked via intel_gpu_top
