You should be able to edit your forum profile from any device that you can read the forums. Note the forums are really the software Discourse, which should be very stable and have feature parity across all platforms. And the forums are all done in the browser anyway, so as long as your phone has a real browser, it should be fine. I believe nowadays all smartphones are like this.
For example, I can edit my forum profile on my tiny iPhone (SE gen 2) via the built-in Safari browser. I recall you’re on Android? Shouldn’t really matter in this case.
If you want more help and to trade screenshots, feel free to PM me.