Thanks again for the answer. Quite an interesting process, very different from what I thought.
Due to what you explained, I researched a bit and found out about Godot's "-colonly" and other extensions to deal with collision objects. That helps the workflow a lot! https://docs.godotengine.org/en/stable/getting_started/workflow/assets/importing...