As for UITK support for addressable. It can be achieved by setting the defaultSpriteAsset in the TextSettings. In which case, the following syntax can be used: <sprite index = XX >
Alternatively, if a defaultSpriteAsset is already assigned, it is recommended to add the new SpriteAsset to the defaultSpriteAsset fallback list. In which case, the following syntax can be used" <sprite name=\"NameOfSprite\">