VM or container? VM is easier and can be usually configured even via Proxmox GUI (Hardware - Add PCI). Various OSes need various levels of effort. Some Linux distros don’t need any more config, Windows on the other hand required a custom GPU ROM on my system to work.
This can be done even with a single GPU, even the built in iGPU.
I have absolutely no idea how Brave got the reputation it has. It’s business model is disgusting and extortionate, it’s like paying for warez. Been clear as day since day one.