Thumbnail Image Not Displaying Next to Search Result Links

I'm having an issue where the thumbnail image is not appearing next to the search result links. This could potentially be caused by plugins like Smush or WP Rocket. I’ve noticed the following code in my website’s source code:

.lazyload, .lazyloading { opacity: 0; } .lazyloaded { opacity: 1; transition: opacity 400ms; transition-delay: 0ms; }