There's a new map of Amidrassil on the Dragonflight Patch 10.2.5 PTR, featuring the new Night Elf capital of Bel'amath and its surrounding locations!
Site of the new Night Elf capital city at the foot of Amirdrassil in the Dragon Isles, the area includes the town of Bel'amath, Belanaar harbor, Arlithrien Lodge, the Twilight Watchtower and Evenfall Watchtowers, and even even a suite of portals to other Night Elf connected locations throughout Azeroth.