All I got to say is that I sent my spit into 23&Me and when it came back not one bit of Native American dna......my great grandmother was full blooded Choctaw Indian. I showed my brother the results and he looked at me with a weird look on his face and said “what? Momma Black isn’t our great grandmother?” I laughed and then showed it a little later to my aunt and she basically said the same thing.....I’ve decided that 23&M and Ancestry.com are a joke......if I didn’t know for a fact that my great grandmother was full blooded Indian I guess I would have accepted the results without question.....
Here’s the thing, your DNA ultimately can only really attest to just two things: your exclusive paternal heritable and your exclusive maternal heritage.
You dad’s mom and your mom’s dad and all their people will not show up in a simple test. Your dad’s dad’s mom won’t either. And so forth.