my website not work will on mobile

I am facing a problem with my site, especially when displaying it on the phone.
My site is very slow, even though I have not added many add-ons.
I spoke with the hosting support team, but it became clear to me that the problem is not with them.
The problem recurs from time to time, even the speed test gives me 30 on the phone.
Even the fonts do not load well.
I have purchased the theme from you more than once, but this is the first time I have encountered a problem like this.

Hello,

Our theme is optimized for speed and should not significantly slow down your website. However, it’s possible that your website’s performance is affected by the content you have added. For instance, the use of too many plugins, large unoptimized images, or other resources can slow down your website.

We recommend that you remove any unnecessary plugins and install a JS & CSS optimization plugin such as WP Rocket. Our guide on how to optimize your website using our themes can be found here: https://xtemos.com/wordpress-performance-optimization-the-ultimate-guide-in-2021/.

If you have any further questions, please don’t hesitate to reach out.

Kind regards

The number of add-ons used is small, and the number of added components is also not exaggerated.

From the computer version, the performance seems much better than the phone version.

I also used the Light Speed ​​add-on without a solution.

Hello,

Avoid an excessive DOM size (https://take.ms/vuauj) – create an HTML BLock for the mobile content where there will be fewer elements and assign it in the settings of the Home page – https://prnt.sc/tSV6cqnUg6lL (works only if you have a separate cache for mobile devices)

Reduce unused JavaScript – Use the WP Rocket to fix that, navigate to WP Rocket -> Settings -> File optimization -> enable Minify JavaScript files: https://prnt.sc/gRnGNFDeaCCN and additionally these options: https://prnt.sc/fCMisMjViraZ

–Reduce unused CSS – WP Rocket -> Settings -> File optimization. Enable CSS minify and combine it

This issue https://take.ms/h6aAw is related to the 3rd party plugin, those files are not related to the theme.

Serve static assets with an efficient cache policy – You should cache immutable static assets for a long time, such as a year or longer, so you need to configure your server to return the Cache-Control HTTP response header:

https://take.ms/vXMSl

For now, it’s adjusted for 7 days on your server (https://take.ms/zXMS4). It should be 1year+ as in the example: https://developer.chrome.com/docs/lighthouse/performance/uses-long-cache-ttl/?utm_source=lighthouse&utm_medium=lr#how_to_cache_static_resources_using_http_caching

If you do not use the Wp Rocket, enable the same options in another cache plugin.

Kind Regards

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