Special:RecentChanges has a large number of available filters for editors to narrow which edits they see in this list:

We would like to figure out where we could add a Topic filter. One suggestion in the parent task was to add it as a third 'advanced' filter, alongside Namespaces and Tags.

Topics are divided into four categories - we may want to have sections in the topic filter to highlight these: https://www.mediawiki.org/wiki/ORES/Articletopic#Taxonomy

Another UX question we need to answer is whether selection multiple Topics should filter for edits which have any or all of those topics. Namespaces are any (all would make no sense), as are Tags.