Baking from blender 2.9 to sketchfab

Hi!

I’m new to uploading my models on sketchfab and having a lot of trouble doing what should be a relatively simple task…

When I upload my model all blender MATERIALS are lost, no mapping or bumps are involved with this model, only nodes from the material shaders, also, I am not using a principle shader, this is a material from the materials library add-on.

I have tried uploading directly from blender, .fbx, .obj, nothing seems to work, all of these attempts have failed including when I try to bake the texture in the model… What gives? Why is this process so cryptic? I am more familiar with modeling in Rhino and other 3D platforms so baking in a little new to me…

This is a somewhat transparent texture I am trying to upload. Any help would be GREATLY appreciated. Thanks!