My family is Greek..really Greek. Really. I did the DNA thing.not one hint if Greek ancestry.
That happened to me too. I found out that they have a database that matches your DNA to a geographical region. And they can only go by the DNA samples they have on file.
“More than 1,000 global regions make up the ethnicities displayed in our DNA test. As DNA science improves, the number of regions we test for (and the countries covered in each region) may change.
This article lists each region, but to see which areas of the globe are included in the regions, you’ll need to view the list from your DNA Story page (which will highlight an area of the map when you click a region). To see all the regions, click See other regions tested at the bottom of your ethnicity estimate and click on a region on the next page.”
https://support.ancestry.com/s/article/List-of-AncestryDNA-Regions