At least the climbing gear is FOSS though!

I kid, but I'm guessing Bazzite has something like openSUSE Aeon's distrobox, which let's you install anything you want inside of a container and expose it as an app. If not, they should consider adding it.

Bazzite uses boxbuddy for distro box automation. It's literally two buttons on a gui, then the app is just another icon in your start menu. It even works well with autostart and desktop integration. It updates on its own. It has an extensive but easy to understand documentation. I've seen literal children do this without issue.

vertical cliff

Massive exaggeration.