Does God have a plan for all the galaxies?

Of the increase of His government and peace there will be no end. Is 9:7

I’m not sure what that means. I get that His peace can continue to grow through eternity because peace is an aspect of His nature that we will continue to explore and understand forever. But His government? His government is His kingdom. How will His kingdom continue to increase after He calls His bride home? We won’t be growing families in heaven like we do on earth, so it won’t increase that way. Will His kingdom increase throughout worlds without end? Are there other people that He will draw into His kingdom that we don’t know about? There’s so much that we can’t and won’t understand this side of eternity. I think He’s just teasing us with little snippets of heaven to make us want to know more. I definitely want to know more. His picture is so much bigger than mine and I want to see it all. Any thoughts?