Why doesn't wp all import Pro save custom fields to database?

Question

WordPress

There is a paid version of the plugin Wp All Import + add ons. I first create an export of one filled product, then, using this example, I fill in the entire table of products for the site.
There are no errors when uploading. All custom fields are displayed on the product card page, but when editing a product, these fields are not displayed. Although such items as "Title", "Description", "Image and Gallery" are correctly saved.
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Answer 1

Why not ask this question to the developer?))