Maximum number of search results in the drop box

In the search drop box, it shows a maximum of 50 results. You can click on advanced search to find more, but is it possible to show more in the drop box? If it’s simply truncated at 50, it gives the false impression that there are no more results.

These closed topics from 2017 say the max is 500, but it doesn’t specify whether that’s in the drop box or advanced search- maybe advanced search was added since then.