Gemini.com uses the same issuer (WebBank) under the hood. I already had an account, so I went ahead and opened their card for the hell of it (credit). It was Mastercard, Klarna is Visa, but I figured I’d try it anyways.
Doesn’t appear to work according to the Fidesmo Pay card checker:
Oh well. Credit score is temporary. Joy from paying with my hand is forever.