Cyno is speculated to be available in the game near future.
Cyno appeared in this Genshin official video.
You can see him in Genshin Offiial Manga as well.
Mondstadt Region Puzzles, Secrets, and Hidden Chests
Puzzles, Secrets, and Hidden Chests in Dragonspine
How to Beat Monsters/Farm Enemy Drops
Crystal Core Farm Locations
Xiao & Invitation to Mundane Life Event Wish
Ganyu Event & Adrift in the Harbor Wish
Top Mining Spots in Dragonspine