Search all assets -function, please?

I just delivered the first package of usd scenes to my customer. I tried to use the collect assets -function but it does not finish the job in A2F: Collect assets never finishes

So I had to manually gather and re-link all my usd files to one folder, zip it and send it to my dear customer. He opened the main scene and lights are missing etc.

This is due to the issue that the internal USD links are still broken, no matter how I tried to keep it all clean.

So we need a “search missing assets” -funtion. Something like this: Finding MISSING TEXTURES (Pink Texture Fix) in Blender! - YouTube

Please?