Even though Dehya was released just a couple of days ago, the game's official social media accounts already announced two new roster additions for 3.6, the owner of the Bubu Pharmacy known as Baizhu, and the famous Sumeru architect, Kaveh.

Source: https://gamerant.com/genshin-impact-most-popular-five-star-characters-demo-views/

Of course, other regions, such as Inazuma, also have underground areas, but Sumeru significantly added more.

Source: https://screenrant.com/genshin-impact-sumeru-underground-interactive-map-hoyolab/

Since then, HoYoverse has added multiple expansions including a brand-new major region named Sumeru which also introduced the long-awaited Dendro element.

Source: https://gamerant.com/genshin-impact-fan-video-horror-game/

The archon may be the rightful ruler of Sumeru, but this political force has maintained control leading up to the events of this expansion.

Source: https://www.cbr.com/genshin-impact-best-parts-sumeru-expansion/

The Dendro Archon, also known as Lesser Lord Kusanali and God of Wisdom, played a huge role in the recent Sumeru storyline.

Source: https://gamerant.com/genshin-impact-sky-glitch-farming-artifacts/