>>46512587>a location you can't interact withYou can interact more with the sundial than you can the entirety of Galar.
>has no noticeable story scenes or npcsYou mean it isn't relevant until the postgame after the weapon fires off, which is the catalyst to finding out why the sundial is related to Mega Evolution at all?
>and has no effect on the worldIdk an hour-long fetch quest that has you go over the entire region seems like a pretty significant effect to me.