Hello, LambdaSP,
Due to the fact that all scripts require time to process, you need to optimize your desktop then the speed from mobile will be improved also.
Please follow this article – https://xstore.helpscoutdocs.com/article/100-how-to-speed-up-my-website
Activate XSTORE Ajaxify in the settings of elements (page content), for example https://prnt.sc/EvzLILwXaCKt
Check descriptions of all plugins that are activated on your site and disable plugins you do not really use because every additional plugin slows down the site a bit.
Reduce initial server response time, for this contact your hosting provider.
Kind Regards,
8theme team