The loading speed of theme depends on some different reasons if you see that it loads slowly. Sometime, networking or hosting also the reason.
You should please try using some methods below to improve the loading speed:
1. Install the Autoptimize plugin
2. Remove unnecessary plugins
3. Optimize product images
4. Install the jsDelivr – WordPress CDN plugin
5. Intstall the WP Super Cache
6. Contact with your hosting administrator to increase the speed
Hope it useful for you!
Besides, we will also help you to check how it runs slowly. I will inform you when my coder gives me the feedback.
Thank you!
Yame