I'm a bit confused by your question or perhaps I am just misunderstanding.
Etsy Plus only offers a slight discount on purchasing a domain through whomever they have partnered with (Hover I think). It doesn't give you any special exclusive web address that non-plus users don't have access to. Anyone can purchase a domain from any domain provider and have it redirect to their etsy shop. Your actual shop url will always be the same https://www.etsy.com/shop/DoxieCardsandCrafts . Paying for Plus will not change your actual etsy shop url. If you set up a redirect with your domain provider then those that go to your domain will be redirected to your etsy shop. Did you do the redirect through your domain provider? Is that what you meant by "carried my domain name and set it up ..."?
Here is the Help center page about Etsy Plus with info on what it offers.
https://help.etsy.com/hc/en-us/articles/360001589928-Subscription-Packages-Etsy-Plus?segment=selling
