“The campaign skip to korthia requires you complete the start of the covenant hall, which itself is mostly skippable. Once the first shared chain is completed or skipped, the quest to start Korthia or skip to Korthia opens up in Oribos.”
im not sure about the campaign either but try going to the big desk in oribos in ‘The Enclave’ - should be jaina, baine, bolvar and so on. Speak to them and one should start you on the korthia quest intro
if it comes back false, you should go start that quest in orgrimmar and follow the chain to get to oribos, which should then let you start the rest of the quests
wowhead has a guide for it, but as with everything in Shadowlands, it has about 5 extra layers of nonsense in front of it and you never know if you’re doing it properly or not.
if i remember rightly, in order to unlock the skip campaign you have to do the entire campaign on one character, which then unlocks the skip campaign for all subsequent alts on your account, but you do need to do the whole SL story 1st
I could be wrong, but if you’ve never done it before then yes
you have to do the entire campaign, involving 4 zones
After that, you get to choose a permanent covenant
then you have to finish the entire covenant campaign
at that point the korthia intro should unlock.
maybe if the game hadn’t removed the proper linear way to level from expansion to expansion you wouldn’t be facing that issue but we all must get everything 5 seconds after starting the game
that being said - I have no clue