I tried it multiple times but it keeps saying that it is not supported despite being an RPGM game, is there a way to run it? and also DEV please Don't be like TLS in terms of exp

You can run it on joiplay if you download the zip file and disable joiplay cheats, as far as I'm aware. You can find discussion of it here:
https://itch.io/t/3203309/need-some-help

I don't have an android device myself, so I can only offer secondhand advice here.  People on the discord may be able to help more if the stuff there doesn't.

I do use a similar no grinding model to TLS as I personally think it's a good model. I do think it's reasonably straightforward in terms of getting most exp, though, and you'll never get your level checked for story events etc.