The client wants to have mobile score above 90 on google audits and the current score is between 82-85 on mobile because of the First Contentful Paint 3G
from the pagespeed insights the main problem is First Contentful Paint 3G - 6060ms
FCP basically calculates how long it takes for useful content to show on your page. I would run the test after removing the page load-in animation and see if it improves the score.
Before you pay for another software, do all of the simple things first. Did you minify your code? Are there large files you can shrink and optimize? Can you remove unnecessary custom code?
Something to consider: most top-level company home pages don’t pass the PageSpeed test. For instance, YouTube scores a 27. And https://www.stacket.app scores a 58. I don’t think it will help anything.
Didn’t mean to ruffle any feathers. My point about PageSpeed results is that it doesn’t say much about a website’s performance. Since most top-level companies don’t pass the test (including many pages and sites from Google), PageSpeed is clearly not a perfect benchmark.