Hey! Yes, at the present date these tilesets included are not rpgmaker-ready! I'm still working a bit on tilesets and autotiles, which are not available yet as an rpgmaker format (I would like to provide an actual rgss file with connections and interactions working, but I'm a bit unfamiliar with rmvx, vx ace and mz and it's taking a bit of time) Characters instead are already rpgmaker-ready!
I am planning a big release with godot and possibly gb studio formats all together!