Lyney & Lynette can be seen in the Mihoyo official Genshin trailer, and expected to be appearing in Act IV, Masquerade of the Guilty in Fontaine region.
Puzzles, Secrets, and Hidden Chests in Liyue
Top Mining Spots
Mondstadt Region Puzzles, Secrets, and Hidden Chests
Primordial Jade Regalia
How to make & link your MiHoYo account