Add Variations, Use Existing Products - Search never yields any results

When adding variations for products, if you try to “Use Existing Products” and then attempt to search for an existing product to use, the search never returns any results.
CS Cart Store Builder Version 4.17.2.SP3

There was another post on the forum with the same issue and they said CS Cart support had to create a missing column in the products SQL table:
4.12.1 Adding Existing Products To Variation Displays No Products - General / General Questions - CS-Cart Forums

Some.variation bugs have been fixed in 4.18.

Maybe in them
https://docs.cs-cart.com/4.18.x/history/4181.html

Unfortunately it’s not listed as a fix in 4.18.x