Steps to replicate the issue (include links if applicable):

• Create a Flow topic, hide the comment (post) and/or the topic; then unhide.
• Check the user log (e. g.: https://test.wikipedia.org/w/index.php?title=Special:Log&logid=355616, https://www.mediawiki.org/w/index.php?title=Special:Log&logid=20868772).

What happens?:

What should have happened instead?:
Messages in the local language with a link to the topic unhidden should have been displayed, similar to log entries for deletion (e. g. https://www.mediawiki.org/w/index.php?title=Special:Log&logid=20908081) etc.

Edit: Apparently, this is not the case for undeletions rather than unhidings, which use a "logentry-delete-flow-restore-post" message (e. g. https://test.wikipedia.org/w/index.php?title=Special:Log&logid=355665).

NB: Only thing I could find with these message names was https://phabricator.wikimedia.org/rETHA896ea173034ca09e2c0c609f846f64c21e5820fa, a commit related to thanking for such restorations, which currently still seems to be impossible.