Quad Prefabs have no preview in project view

I created multiple prefabs of quads with different textures. I saved them as Prefabs for level creation but they don’t have an actual preview in the project view.

Is there any way to fix this issue? I am having a really hard time creating my levels cuz i don’t know which prefab has which texture

As soon as i rotate the quad in the preview i can see the texture, but still not on the prefab thumbnail