@ShockW ,
I have gone through your store, the score is here, and speed is very low
and LCP is very high due to different issues found in your store and we can optimize your store without any functionality changes
we can resolved all LCP issues in diffferent tools like PageSpeed Insights , GT-Metrix and Web.dev tools
and we can optimize your store on the basis of these issues
If you need any Kind of SEO/SPEED WORK then Contact Us !!!
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Thank You.