BFA and Shadowlands Campaign Introduction Questions

Good day! I’ve seriously messed up the development for a few of my characters, so far as finding it reasonably feasible to use the Experience Eliminator in Stormwind Keep. I had started the many expansion campaigns that start popping up for new characters at 10th level. I’m quite likely mistaken, but I believe that my hang ups for reverting Stormwind Keep back to normalcy would have been for starting the Shadowlands and BFA campaigns. From everything that I can see, all things should be back to normal, so far as other expansion introductions go. Can anyone tell me, please, exactly how far I need to progress these (hopefully) last two introductions that I need to do to get Stormwind Keep back to its normal state?