The page speed score mentioned on the items page is for reference only and depends on the selected demo, theme and server configuration and the content itself.
Demo: https://themeforest.net/item/swyft-pagespeed-optimized-wordpress-blog-theme/49362787
Are you ready to be compliant to Google Core Web Vitals? JSpeed is the professional solution to speed up your website performance and make Google happy increasing the PageSpeed Insights and GTMetrix rank in a snap!
Demo: https://storejextensions.org/extensions/jspeed.html