Home page not loading & freezing for mobile devices

[Tara86]

Hello, 

We are having issues with our website not loading or only partially loading for mobile device users. We use the supply theme and have not added any apps lately. We had hired a shopify expert to help with both mobile and desktop speed. They have done the following;

The following things would be done to optimize your store speed: -
1. Full speed optimization Audit.
2. Check and fix all halting Java scripts if any.
3. Check and remove apps' obsolete code if any.
4. Check and optimize all website assets (images, CSS, JS, etc.)
5. Images optimization & compression.
6. Optimize the video section to an optimized version if any.
7. Apply Lazy loading per section wherever required.
8. Check and defer scripts wherever required.
9. Improve liquid rendering time.
10. Improve Largest Contentful Paint LCP [Web Vitals] as per Gtmetrix.
11. Improve Cumulative Layout Shift [Web Vitals] as per Gtmetrix.
12. Improve TBT - Total blocking time as per GTmetrix.
13. Improve FID - First Input delay.
14. Pre Load critical assets.
15. Handle third-party script [ app ].

On Pagespeed.web, our mobile performance score went from 37 to 78, and our shopify speed go from 39 - 73, after the above was performed.

But we are still having issues with customers using our website with a mobile device. Which is a majority of our users. 

Please if anyone can help, it would be greatly appreciated.

Website: www.synergy-massagespa.com.au