Here is the process
https://askoart.1b.app/8095/in the process, a document is generated and a viewing block for this document is displayed.
It has a product and the additional field "{row:categorytree_product_customOrderproduct_Dodatkovo}" is filled in, which is "row:product_customOrderproduct_Dodatkovo"
It is not displayed in the document.
I also tried displaying only the add field in the cell, but it doesn't show it either.