How do you get the Teleport Waypoint next to the Empty Boat of a Thousand Gates?
The Teleport Waypoint and Empty Boat of a Thousand Gates Domain are inaccessible until you get about halfway through the Sacred Sakura Cleansing Ritual world quest line. The quest begins with a masked shrine maiden that you’ll see standing in front of a statue shortly after leaving Ritou.
How do you get the waypoint underwater in Sumeru?
How do you lower the water in Sumeru?
Jump off the side of the ruins and glide under the first level into the open side. If you have chosen the west side, now turn to the right, where you will see some ruin machines and a locked mechanism, above which hovers a Seelie. Destroy the machines and operate the mechanism to lower the water level.