CSS background lazyloaded?

Lazy load css background images, is it possible in this plugin?

If we should swap from wp rockets lazy load we need to be able to adjust lazyload threshold and ability to add “Fade In Effect for your LazyLoaded images” is this possible with your plugin if so could you provide me with the code here that is needed?

https://docs.wp-rocket.me/article/113-fade-in-effect-for-your-lazyloaded-images
https://docs.wp-rocket.me/article/1032-adjust-lazyload-threshold