Sprite Sheet Sheet; Spritesheetception

Hello, we're all familiar with the concept of sprite sheets.

However, is there a way to treat each sprite spit by the slicing process as yet another sprite sheet?

Maybe not straight up through unity, but what about through UI Images or Sprite Renderers. Make them render a specific rectangular region of a sprite, and that way simulating a splicing process manually or through a script.

Any way to make a sprite renderer or image only render a part of a sprite based?