One of my profiles doesn't show Products in Top Results when searching in Lightning. How do I add Products to Top Results? If my users with this profile select products from the results, then the record appears.
If I switch them to Classic and perform the same search, the product record appears in the top results.
According to this knowledge article:
Top Results Instead of Search All
There isn’t a Search All option in search results. Top Results displays the most relevant records grouped by your most frequently used objects. To see results for other objects, click object names on the left side of the page, under Search Results. Searchable objects are listed in the same order they appear in the navigation bar. If you don’t see an object listed under Search Results, select Show More to see all objects available to you, listed in alphabetical order.
https://help.salesforce.com/articleView?id=lex_gaps_limitations_search.htm&type=0More on top results here:
https://help.salesforce.com/articleView?id=000228259&type=1