From Multiverses wiki

Obeidon is a multiverse cluster, containing hundreds, if not thousands of universes within its boundaries. It is the only place where the Infinite Creator can manifest.

It is absolutely certain that there are more multiverse clusters that are supervised by other grand creators.

To imagine the magnitude of the Obeidon cluster, imagine the ocean. Every single living organism in the oceans is equivelant to a universe. Every bone, every muscle, and every structure in the organisms' bodies is a galaxy. Each cell in the structures is a planet. And imagine yourself as one tiny speck of DNA in this ocean. This gives you a good idea of the scale.

This multiverse contains several universes.