Just to put it out here. Termux has proot-distro that allows you to run qite a few distros as containers. Technically not a VM afaik. I find it useful, because it is sometimes simpler to wipe that instead of reinstalling Termux.

pacman + yay + appman (in cases where appimage is more convenient)

If you need something from AUR, Chaotic AUR builds some of them.

Technically I also use managers for certain languages and environments, so sometimes cargo, pip, luarocks, … whatever.

I did try to use flatpak in the past, but I just found it annoying. If you do not explicitly need it’s capabilities for a certain app it is mostly makes accessing app’s config and data a major annoyance imo.