Could you please go into more depth on how exactly you export the meshes? Are you exporting individual parts one at a time from that file? If not, how so?
I’m also confused as to why the textures aren’t being transferred over too
It depends on how you textured the meshes. I don’t have much experience with textures, but when I use them, I texture them with an image and then upload that image to studio and apply that image to the mesh in studio. It’s up to your personal preference.