Im searching for a FOSS office suite for android that is not cloud based and that lets me both view, create, and edit documents so far the only thing that i found that meets all those requirements is collabora, BUT IS TRASH!, i literally cannot even scroll down without it glitching out and sending me to a whole different part of the document!
On mobile devices, text markup languages are the way to go. Viewing office suite documents is enough… editing them is not easy. I have used groff, tex and latex, and typst recently (on Termux, obviously) with various degrees of success. I wonder when we will have FOSS apps that are as usable or more than Google’s Docs and Sheets.
If your PDF viewer supports re-reading when file is changed (or reloading file every time app comes to foreground, I suppose),
typst watchand that viewer open is the closest to a WYSIWYG I could get working.