They got merged a few hours ago

Sure but how often do you need to actually change your machine?

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Try using just Termux. You can actually do a lot with it, even without installing a distro. If you want Debian though, one approach would be through proot-distro which installs a traditional distro in the Termux environment. It has some limitations, check the wiki page.

There’s also Sharedown if you want a GUI