Update: GDevelop nos supports 3D animations.
Read the release notes here: Release 5.2.165 · 4ian/GDevelop · GitHub
With the new 3d object, you can use a .glb file as the object. This is awesome, but it is lacking something. Animations. I was thinking, similar to how normal sprites use separate images for animations, why not use separate .glb files as the “frames”. Or, you could use animation data in the .glb file, but that be a pain. This would allow for more detailed games.