SUMMARY
There is a filter by tags option in the search panel but it is very limited. It currently doesn’t work at all (https://bugs.kde.org/show_bug.cgi?id=488047), but when it did it consisted of a drop down menu of every tag in your entire indexed system, which you can tick to only show items with those tags. This list can be very long if you have a lot of tags and has no search function within it; in fact it can be so long it can go off the bottom of the screen, and there is no scroll function to get to the bottom of the list. A search function and a scroll function for that Add Tags dropdown in the search panel would go a long way to allowing users to sort through lots of tags. An even more useful way to make that list easier to navigate would be to hide tags if they would yield no results; that is, only show tags in the folder being searched, that appear with the tags you have already selected.

STEPS TO REPRODUCE
1. Currently not reproducible as the menu is broken.

OBSERVED RESULT
(previous versions) Can view all tags and filter by them

EXPECTED RESULT
Can view all tags and filter by them, the list only showing tags that will yield results, and to search tags from a potentially very long list.

SOFTWARE/OS VERSIONS
NixOS 24.11 (unstable channel)
KDE Plasma Version: 6.0.5
KDE Frameworks Version: 6.2.0 
Qt Version: 6.7.1