Speed up Wordpress Websites (Improve Google PageSpeed Score) - Website Optimization -- 2

Recently had another freelancer install a custom version of WP2Speed, which did give me a high score on Google PageSpeed, but it has now started to cause issues, I need someone to either set it up again properly with the official version, or use another similar plugin/optimization method to achieve 90+ on pagespeed test.

Below is the original freelancer post:

I'd like to achieve a higher Google PageSpeed score on my 2 ecommerce websites, especially for mobile. Both websites are essentially the same, 1 is retail, 1 is wholesale, both use OceanWP and Elementor, both are hosted by WPXHosting. I've tried both Breeze and WP Rocket plugins and can't get over 30-ish on mobile (desktop is hovering around the 85 mark), I just don't have the expertise to tweak things properly. I've tried to unload certain CSS and JS from the OceanWP theme but it keeps breaking the custom Elementor header I've created.

Possible areas to tweak:
- Unload unused OceanWP CSS & JS
- Setup WP Rocket for caching
- Defer JS
- Find and remove Google Analytics code that's being loaded and use CAOS plugin for local analytics file instead
- Get Optimole working with caching plugin and serving WebP images

The 2 websites are:
https://elqdecigs.co.uk
https://distro.elqdecigs.co.uk