Hi,
These page speed results are inconsistent.
I’ve ran your page through PageSpeed Insight multiple times and it scored differently every time. (91-98 for desktop, 74 – 80 for mobile).
My point being, these results can help you find the issue but it shouldn’t be taken too seriously.
Why CF is not taking all these into consideration? Should I use wp rocket too?
The site is new and very simple. Has only 2 posts.
Since you’re already using autoptimize, you don’t have to use WP Rocket. Stick w/ one optimization plugin to avoid conflicts.
Also, you may find this article useful. https://onlinemediamasters.com/autoptimize-settings/