If your site uses native image lazy-loading, check how it's implemented and run A/B tests to better understand its performance costs. It may benefit from more eagerly loading images above the fold.

"LazyLoad is a Chrome optimization that defers loading below-the-fold images and certain third-party iframes on the page until the user scrolls near them"

"We can do that by utilizing Lazy Loading. Lazy loading is a great way to optimize your site, and it does that by splitting your code at logical breakpoints, and then loading it once the user has done something that requires, or will require, a new block of code. This speeds up the initial load of the application and lightens its overall weight as some blocks may never even be loaded."