Dynamic material on mobile - won't show in mobile preview

Hi, is there anything that won’t work if I use dynamic materials for mobile? I ran my project in mobile preview and it won’t show any of my dynamic materials.

I’m not doing anything super fancy, it’s domain is ‘surface’ and it’s opaque and unlit. It shows up as black when I play the game, there’s a small chance it could be something else but it happens to both my materials.

Is there anything else that happens when I run in mobile preview (PIE) view as opposed to new editor window (PIE)? I have yet to try my project on an actual device as I’m getting some compile issues (…