it has distrobox built-in, nice to use for non flatpak stuff and dev environments.
GUI apps like BoxBuddy and DistroShelf makes it really easy.
Discussion
i would just recommend DistroShelf but exporting apps with BoxBuddy is easier.
im actually making my own gui app for managing and isolating AppImages, Distroboxes, and Flatpaks in one place nicely. but its not done yet.