maged120 Thanks for clarifying, and recognising that your site speed is going to be affected by the number of images you have. You may want to bear that in mind going forward! For example, if you're unable to improve your site speed with Leap, reducing the number of images on your site might be something you consider, depending on how important speed is to you.
Also, you should work on improving your cache hit rate. A good cache hit rate will directly correlate with good site speed. To improve your cache hit rate you should stop clearing your site cache manually. Instead, use the Ezoic plugin for CDN management. With the Ezoic caching plugin you can set up a feature to automatically clear the cache when content is updating, but rather than clear the whole site cache the plugin only clears the cache of pages that are relevant. This therefore gives users instant access to updates but this won't hurt your cache hit rate as much as clearing the whole site cache. You can read more here: https://support.ezoic.com/kb/article/how-can-i-set-up-the-ezoic-wordpress-plugin-for-cdn-management