Hi Andrii @broov3rD ,
First of all, thanks for the file!
I haven’t been able to find what’s wrong yet; I can Render just the Displacement:

but as soon as I also enable Surface.001 (the paint), it only Renders the paint as you show in your images.
If no-one else knows why this is, I will look at it again tomorrow, with a (hopefully) fresh brain; I am intrigued 🤔