@dreamzspl I’ve tested the homepage with PageSpeed Insights, as well as GTmetrix. While you can unload CSS/JS and even whole plugins (this option requires the Pro version) via Asset CleanUp, there are things that are beyond what the plugin does. In my tests (the page is cached as I’m a guest visitor), I’ve got under 600ms for the initial server response time. So, you’re saying you got over 5 seconds. Perhaps, you were logged-in and had extra scripts triggering then.
One thing you can focus is the images. They are quite large and although they have the WebP extension, they are still not fully optimized. For instance, the following image – https://cdn.pawmeal.com/wp-content/uploads/2023/04/Pawmeal-Assorted-Flavours.webp – when saved and uploaded to a service such as https://tinypng.com/ would generate an optimized file that is 27% lower. Try to run a GTmetrix test on the homepage, and you will notice how so many images are there that could be optimized.
As for unloading the CSS/JS that is not needed, there’s no automatic solution from Asset CleanUp and you have to choose the assets that are not needed. If, for instance, you have a plugin that you know is never used on a page, but loads CSS/JS on that page, you could unload its assets, then load the page, and if everything works fine (including on mobile view), then you can leave them unloaded and continuing with trial and error (unloading assets that are likely not needed and testing the pages).