Hello,
In general, our theme is already optimized and don’t have too many resources to make your website slow. Most likely, your website performance suffers from the content you have added to your website. It may happen in case of too many plugins, large not optimized images or other resources. So we suggest you to remove unnecessary plugins, install some kind of JS & CSS optimizing plugins like Better WordPress Minify and caching plugin like WP Super Cache or use WP Rocket for both tasks. Also, you can use GTmetrix tool to see what makes your website slow and optimize these parts of your website.
It might be possible that due to your hosting server the page speed suffers. We do not have any person who can set your site speed for fee, as the same speed as our demo site. You can hire a developer for this purpose.
Best Regards.
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