Hey mate I have found a fix for your issue, as I had a similar problem with my electric kick scooter site. Go to shopify admin -> domains -> and check what domain you have listed and that it matches with the one registered in Google Search Console. My issue was that I registered the WWW.domain.com version of my domain in GSC, but the HTTPS://domain.com version in shopify. Just change them so they match and you'll be all good to go!
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