Hi Sergei,

We might be able to help (we are in the QuickBooks Online marketplace -- search for Crik-IT).  We have a "Customers Who Haven't Purchased" report that I think may do what you're looking for.  You can see all customers who haven't purchased any items (or a specific item, or any item in a particular product category) since a date that you can specify.  Here's where you set the filter options -- the options below will show us all customers who have not purchased "rocks" since 6/1/2023:

Here's the report that is produced:

Let me know if you would like more information.