You have definitive proof for this assertion, NM? After all, if God is able to exist in a tripartite nature and in both human and spirit form, why shouldn't he be able to have multiverses?
It's quite simple really Hope...They aren't needed (multiverses)...not to make this universe to function as it does...and give quick and easy access to many different places in the Milky Way...I could say universe, but that would require even more expertise.
True that there are three aspects to God's authority...He, himself...Jesus Christ, his son...and the Holy Spirit, which we ourselves develop by following Jesus' accurate teaching. Each separate and individual parts of that high authority.
If Almighty God wanted to come here in the flesh I'm sure he could and there would have been no difference in the righteous teaching or the outcome...but that would have left all those in Heaven without leadership for a time and so Jesus undertook to bring that righteous knowledge to us on God's behalf...knowing full well what the outcome would be and the full impact on those who value righteous good order, against the disgraceful mechanics that the world offers us today. But, you see, we have got to follow the full extent of the knowledge of good and evil so that we know exactly which side we are on...either on the side with solid, righteous, resistance, to Wormwood or the side with no resistance what-so-ever.
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