One thing I forgot to mention in the previous thread (apologies if it
was already mentioned, I didn't see it) is you could try git-annex. The
android version does rely on termux as its runtime, but interacting with
it is through a local web server, so if use of termux for initial setup
is an option
Since I use a command line on the computer I got orgsly and dropbox
working on the phone.
If I can get rclone working on the computer with dropbox I'll have
synchronizing capability.
Other applications on archlinux and slint either don't work or aren't
accessible for screen reader users like me.
M