With the introduction of the "mw-reverted" tag in T254074, we now see more frequently that tags are applied to revisions at a time that is not when the edit was made. This type of information is not readily available in MediaWiki History. It might be possible to infer this from comparing timestamps of an edit tagged with "mw-reverted" and the reverting edit, provided we can identify what the reverting edit is.
One source of information on these tag change events is event.mediawiki_revision_tags_change in the Data Lake. I'm unsure if MediaWiki logs these changes anywhere (e.g. the logging table).