As of Patch 7, Larian Studios added official . You can now browse and download these types of "Holy Knight" mods directly through the game's main menu under the Mod Manager tab, provided you have the Toolkit Data DLC enabled in your library.

Adds specific subclasses themed after deities like Shar, Selûne, and Helm, allowing for necrotic or psychic smite variants. You can find it on mod.io .

If you are looking for expanded "Holy Knight" gameplay beyond the base Paladin class, there are highly-rated free mods available:

Adds new subclasses and unique elemental smites (Holy Fire, Holy Lightning, and Holy Ice). It is available on mod.io .

Focuses on adding high-quality, lore-friendly armor sets for knight characters. Available on Nexus Mods . Official Mod Support