Merging Custom Projects

Hi all and thanks in advance for any help you can provide me. I have two custom projects that were started from scratch (Datasmith imports, assigning and creation of materials) and I want to merge these two together. I can merge the textures and geometries just fine but it’s the actual fbx meshes that have me stumped. Why? Because the only fbx mesh I have upon merging is a simple box of my custom mesh…and I didn’t spend three weeks modeling a box! lol. Each mesh has 20ish individual geometry parts and I don’t intend to try and import and place each of those from the geometries folder. I am using Unreal5.

So I seem to be missing a piece of the puzzle here. I can open both projects and they look great but it seems there should be an easy way to do this.