How do I fix duplicate title tags on my ecommerce site?

[HeftyberryStore]

Dear Shopify community,

When I test my website heftyberry.store tru Semrush, it lets me know that most of my pages have duplicate title tags. I've been poking around in the theme code and cannot find where the duplicate titles are. Title tag isn't in theme.liquid or product liquid.

All of these tags are "Heftyberry". No idea where its added. Please advise thanks!

[HeftyberryStore]

www.heftyberry.store