I don’t think your sites that slow to be honest mate. The top loading times other than Shopify stuff looks like Google leads and there’s also a failed request to this URL: https://unpkg.com/eventemitter3@4.0.4/umd/eventemitter3.min.js to get come javascript, this might be important for elsewhere on your site though.
Cheers,
Oli
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Founder @ www.preproduct.io
Test and make sales for future products