lazy load background-images in style blocks

Divi, Elementor, and possibly others like to shove background-image rules into a completely separate block. Currently, we can only lazy load CSS background images that are inlined directly on an element. But what if one could parse style/CSS blocks, then add in "duplicate" rules with the "lazyload" class? Then when they are changed by LL to the "lazyloaded" class, the original rules would kick back in and load the original image.