Hi! We need to add simple functionality. It can be a string that shows last texture before it was missed. The name of that texture is already in .uasset file, but not shows in editor.
Also I found a question about it:
How to find out missing input texture in material?
Open this file .uasset in editor (I use Total commander). Find by search (Ctrl + F) all used textures with prefix “T_”. Also you can exclude ones that you can see in Unreal Editor.