iOS/iPadOS only kill background processes if they're resource hungry and competing with another resource hungry frontmost app and resources are running low.
Anecdotally, on my iPhone 11 Pro Max w/4GB of RAM it's very rare for apps to get killed while multitasking. There's been a few times when I've brought forward an app I used multiple days ago and it's still running exactly where I left it.
Based on that, with these new models having 8GB and 16GB of RAM processes getting killed should be pretty rare. On top of that, it's highly likely that virtualization apps would be given increased protection from getting killed due to their inherent extra overhead.