I just migrated a rather large project from Unity 2019 to 2021, which went overall pretty smooth. The only thing that didn’t make it are two prefabs containing a simple Blender cube model (with smoothed edges), an UV map and two different textures. The meshes are completely missing, and also if I explicitly export that prefab on 2019 and reimport in 2021, the meshes are not coming with it. Also, pulling just the Blender file into the assets doesn’t create a usable object (like before on 2019).
Has anything changed in the way Unity deals with Blender models?