Thanks to everyone helping fix the first set of tasks.
There are a few more which are now more visible.
https://phabricator.wikimedia.org/T129763
"beta wikipedia test builds fail"
https://phabricator.wikimedia.org/T129281
"Test test_content_format failing due to new member
'application/vnd.php.serialized' on Wikibase repos"
(guess: a Wikibase php change has unintentionally exposed this content format)
https://phabricator.wikimedia.org/T89769
"testQueryApiGetter timeout failure"
(Wiki Data Query has become slower?)
https://phabricator.wikimedia.org/T128986
https://phabricator.wikimedia.org/T128994
ProofreadPage is doing a purge without write permission