The list starts from the one closer to the original Chinese Xianxia novels, to the one that resemble them the least.
Ave Xia Rem Y
Speedrunning the Multiverse
Heart of Cultivation
Sundered Soul: A cultivation Wuxia/Xianxia novel
Rise of the Midnight King
The Precipice of Power
Outer Sect Disciple
Beware Of Chicken
Silver Fox and the Western Hero
This Young Master is not Cannon Fodder
Arrogant Young Master Template A Variation 4
Street Cultivation - a modern wuxia/litrpg hybrid
The Essence of Cultivation
The Dao of Magic
Dungeon Core/Realm Heart
Dragon Heart (A LitRPG Wuxia) series
Just so you know, not every novel tagged xianxia that I have read is here. I consider a Xianxia, and a Cultivation story, two different things.
Also, as I said this is a list of novels I have read. I didn't read every Xianxia fiction on Royal Road, and some I may have forgotten.
The lasti thing I want to say is that I didn't like all of them, some of my favorites went low on the list. I tried to make the list based on my criteria for Xianxia, but it's not so easy due to all the variations.
P.s. Some are on Hiatus, or are Stubs, so be careful before you read.