@L-i-am what happens when you click on Explode or even Edit Group?
Screenshot - 4_27_2024 , 10_13_44 AM.png
I can imagine with all that geometry SketchUp Free would be very sluggish. It's really not intended for models with the level of detail you've got there. It's not just overall file size but also entity counts that affect performance. Same as with the desktop version but the hobby version has more limitations.