Heya, Recently i watched for blizzard posts and found a thread here
https://us.forums.blizzard.com/en/wow/t/wow-classic-not-a-bug-list-updated-10-28-2019/175887/139
There is noticed that Righteous Fury should work on all holy abilites and it isn't a bug
Here is some evidences how it works
https://www.youtube.com/watch?v=6Qv-Povncwo
https://www.youtube.com/watch?v=bTSzhJTHS5I
Here is also one more blizzard's post
https://ru.wowhead.com/news=295877/oct-28th-update-to-not-a-bug-list-thrash-mechanic-righteous-fury-sharpening-ston
This means that holy abilities of the paladin like Greater Blessings of Kings how it showed on the videos, Holy Light / Flash of Light , judgements of wisdom or light, maybe cleanse should scale with Righteous Fury and manage big threats thanks to Righteous Fury