How am I supposed to read and edit my org mode notes from my Android device?

Yes, I do in fact use Orgzly. For a very specific subset of notes it's fine. But for a long bit of documentation, no good editor exists on anything but a desktop / laptop. That is, nobody's reimplemented enough of Emacs on Android yet.

Org mode files are text files so you can edit them with any editor. Place them in a sync folder and if your sync client is any good it should be able to edit.

"Long bit of documentation"? Isn't it the device that's not suited? I sure wouldn't want to do a lot of typing on a handheld device. Emacs shortcuts should be fun.

The point of that if The text is to be edited in a general purpose text editor, I would rather it be in Markdown. Org mode is pretty useless as a format outside emacs proper.

Actually, the Org format is supported by web sites like GitHub and GitLab, and there are several parsers in different languages. It's even supported by Pandoc, so you can convert to/from anything Pandoc supports.

In contrast to the actual Android apps that handle Markdown natively.

Don't get me wrong, I love org mode, but there is no real support on Android other that a damn-fine list-making app that uses a subset of org-mode format for its lists.

I have heard rumours that one can get Emacs up and running fairly well in Termux, but I haven't explored it personally yet. Orgzly is good enough for most of my Android Org needs.

Yes, emacs runs very well under termux, complete with swipe to scroll.

For typing, Termux's "extra keys row" makes ctrl and meta combinations possible with your favorite keyboard: https://wiki.termux.com/wiki/Touch_Keyboard

...or you can just use Hacker's Keyboard (but I find it too cramped).

Git also runs fine under termux if that's what you use to sync your org file.