You can easily apply and export the spaceship mesh. However, material is Blender's exclusive shader mechanism, so I don't have an effective way to export it outside of Blender.

That is completely normal, because this geometry nodes has a lot of heavy nodes such as mesh boolean, so the computer needs some time to process and update them.

This tool currently compatible with Blender 3.6 and higher version. I will continue to work on making it compatible with future versions of Blender as well.