I'm not aware where you "claim" a domain in Google Analytics, GA is more about installing the script.
Do you instead mean claiming the domain in Google Merchant Centre? Having the GA script installed (and being an admin for that GA account) while signed into merchants.google.com is typically a method to verify GMC, that approach sometimes has issues on Shopify. I usually use GTM or "add html tag" to verify a site in GTM.
If you mean you're trying to verify in Google Merchant Centre - then: