Genshin Impact 2.0: Getting In Secret Grate-covered Room Under Grand Narukami Shrine! (read desc.)

Turn on subtitles for instructions. This method is not quite as simple as the method where you position yourself on top of the grate and relog to activate the lever underneath, but it does maintain the integrity of the room so as not to permanently leave the gate open. Thanks to 『Asphixiem』 in the comments section for pointing this out.