Verify Mesh and shaders a fully loaded and rendering

How can i verify a mesh has loaded and all its textures and shaders are rendering correct

I have a dynamic icon system thats rendering out grey icons sometimes ( materail not fully loaded)
Im async loading the mesh ahead of time, so it should be in memory. I also have the prestream texture node used on the intended mesh, and then .1 delay on top of all that. Dunno if i fully understand what the prestream texture node does, but it sounded like the thing to use.

Any one know what im missing or what the best practice is for this kinda thing?