I don’t know if she has any Sami in her heritage, and they aren’t prevalent in Iceland, but she has the classic Nordic facial features. I’m sure that is why she is considered ‘fat’.
The single biggest genetic heritage in Iceland is Irish.
The fewer Viking overlords took all their Irish servants with them when Iceland was settled.
The Sami are actually not Nordic.
They are genetically distantly related to Hungarians, I believe, and are darker.