Hi @EvaUR - and thanks for the tag @kvlschaefer.
I think of a custom report, pivot table in this scenario. I’d start with Deals as primary source, and line items as the additional data source.
I don’t think I’d add the filter for “Product: Name” contains any of “washing machine.” I think that would only show you those products. What I’d try to do is see if the pivot table could show me washing machine in the column headers, and what other product names are in the Deals under the rows.
Since I don’t use our HubSpot in this way, I can’t show a good screenshot, but that’s how I’m thinking of it nd how I’d “play” with the reporting. Hope that helps inspire and answer.