I am currently using the Sprite Library and Sprite Resolver components on my in-game player object, which has a Sprite Renderer. This is very useful for swapping out the animation sprites all at once based on the selected character.
I tried doing the same thing on a UI Image object (which has the Image component rather than a Sprite Renderer), but the Image component’s Source Image does not change when selecting the sprite in the Sprite Resolver (i.e. the two components don’t appear to be linked in any way).