If you still have some remaining Primeval Essences from the Dragonflight pre-patch event in your inventory, you will be pleased to learn Storm Vendors are still around on live servers.
Storm Vendors that sell item level 252 catch-up gear have not despawned, even though you can no longer earn Primeval Essences. The currency is BoA and can be sent over to alts, so if you have some laying around in your backpack, you can still buy gear to give your alts a head-start into the Dragon Isles.
Your alt must be Level 60 to buy the gear even though the Dragon Isles are available at Level 58.
