This is because the save file is not actually in Android storage.

i have rooted phone, and can access data/data location. but can't find it.

So where is the save file stored?

All save files saved in Android will be saved in web storage.

because android version of rpg maker mv is based by webview.

and that's reason why can't find save file on android storage.

If it's stores in web, it definitely needs an internet connection to access it right?

But I tried it without an internet connection and it still loads and updates the save. But it is nowhere to be found in storage.

What witchcraft is rpg maker