It's a long story but in short these are not scripted (yet).
Cataclysm Zones - Quests + Phasing https://github.com/TrinityCore/TrinityCore/issues/15182
[master] WoD missing features https://github.com/TrinityCore/TrinityCore/issues/13825
Wandering Isle is checked but it has some serious issues. I hope one day Lopfest will be able to finish this zone. https://github.com/TrinityCore/TrinityCore/pull/17021
(Also there is no post cata content on Trinity... I tried to help them with initial spawns but as you can see from the conversation there is zero feedback so I stopped contributing. https://github.com/TrinityCore/TrinityCore/issues/20186 )
Play these zones on offical then use the quest commands to skip these zones on Trinity. (quest complete & quest reward) https://trinitycore.atlassian.net/wiki/spaces/tc/pages/2130065/GM+Commands