If it's in Godot, then it should be a top-down, JRPG-style game. Octopath Traveler has a different, more side-view perspective. If you somehow pulled it off in RPG Maker, that would be fine, but for Godot, I'm afraid I'll have to say no.
That said, if you change the perspective to be top-down, then it would be fine even with actual 3D models.