This guide shows How to unlock the Garden of Endless Pillars Domain in Sumeru in the game of Genshin Impact 3.1 update, which was released on 28th September 2022.
When you get to the location, you will notice that the domain has been locked and that there is a small puzzle to solve.
Basically, you must employ an electro character to activate the torches/totem in the correct order. You will notice an invisible wall and some flowers inside it to find it. You must light the torch/totems in the sequence of the number of flowers visible within the invisible room.
Garden of Endless Pillars Domain puzzle
Starting from the number zero, light up the torch with zero flowers nearby. Similarly, you need to activate the totem with two flowers and this goes on.