This is continuation of T259103: Run reverted tag update job only after the edit is approved which explains the idea behind the hook. As of writing the hook is pending code review (see https://gerrit.wikimedia.org/r/c/mediawiki/core/+/616815).

FlaggedRevs is used on multiple Wikimedia wikis, so it would be nice to deploy the reverted tag feature together with a related patch to the extension, so that WMF wikis get the full feature set right away.

There are two parts to this:

• The BeforeRevertedTagUpdate hook that should return whether the edit is auto-approved or not.
• A call to RevertedTagUpdateManager that would re-enqueue the reverted tag update when the edit is approved.

This shouldn't be too hard and I'll try to implement this myself, but I haven't really ever used this extension, so I may get some things wrong. :)