Hello,
Read this post https://www.8theme.com/documentation/xstore/troubleshooting/how-to-speed-up-my-website/
Disable all the plugins that you don’t really use (even if they come bundled with our theme), for example, if you don’t use 360 products then there is no need to keep Smart product plugin enabled. if you don’t use Elementor then don’t install it etc.
Also, we use the WPRoket cache, it speeds up the site speed a lot.
Regards