Not sure if it was a plasma issue or a wayland issue, but I tried it last year and had trouble with cursor locking.
Virtualbox had issues with the input being intermittent, and my mouse would move off the screen while gaming.
It might be fixed now, but I don’t plan on trying it again for another few years, because what I’m using works for me.
Here, take a penguin 🐧
It’s the best I can offer.