The maiden of vitality in BFA told us there were containment breaches in multiple Titan facilities, Uldorus being one of those mentioned.
In Dragonflight, we just happen to be doing things at Uldorus, the rather horrible laid out place known as Tyrhold. Yet in game, we see literally nothing to indicated anything was ever contained there. So what do you believe has happened here? Even the modern writers forgetting or disregarding their own lore? Or something we haven’t seen yet?
Personally, could be interesting if something was actually contained there, and it will worm its way into the new Tyr or something as we try to bring him back.