Could we have a way to search for posts with a particular reaction? I envision this as like searching by post type; IDs aren't exposed in the UI, so we'd need the pop-up widget that lets you select from a list. This would be a helpful tool for communities in deciding how to curate both their reactions ("when is that used?") and their content ("let's review all the dangerous answers").

#678 is related and asks for a way for moderators to see usage data about reactions. That and this might share underlying queries, but the UIs are different.