Does it come with an example Godot project?
In hindsight, perhaps you could make a combo-pack of your various space-themed assets that includes a Godot/Unity project that has them in a scene.
I would like not to commit to maintaining such scenes for all future versions of the engines, I hope you understand. If you join my Discord I can help with Godot UI questions. And as a special offer I could send you or anyone who purchased the Godot scene for the screenshots if you/they joined the server.