You can use wayland in container but the easy way probably would require to give whole GPU to the container (but my knowlwdge is limited)
What I do know that this project is doing that: https://games-on-whales.github.io/
That also came up in search results that could help: https://unix.stackexchange.com/a/359244
Container is just a term for a set of isolation solutions bundled together.
Like file system isolation (chroot), network isolation, process isolation, device isolation…
One of them is ofc chroot, yes container use exactly the same chroot functionality.
So to answer your question, no, you don’t need full isolated container. You can use only chroot.
You just need to pass all required devices ( and match the driver version running in kernel with your files in container and (avoid) more than one app having full unrestricted access to GPU as that would result in issues (but dont know the details so can’t help you with that)).