Hello, there.
There are lots of factors that can be improved to increase your loading scores like these – Jetpack Boost is just a part of the overall puzzle.
Keeping your total plugins low while working in tandem with a proper caching (and possibly minifying) plugin is ideal, but to really get the best out of your performance after using the features inside Jetpack Boost, I would also recommend running your site through tools such as https://pagespeed.web.dev or https://www.webpagetest.org to really dig deep and follow their detailed instructions to get your site responding quicker.
