Are Russian regions accurate?

I got these regions, which I actually think is some of the coolest data I've seen so far!

I do have questions though, because Russian regions don't make sense. So, being that Russia was basically just internal migrations throughout the country, I researched it, and apparently if you're not something like Native Siberian or Turkic, you'd basically have the same genetic signature as someone from Moscow. How would they detect the other regions that showed up in my test? I'm especially curious about Tomsk, because that's all the way in Siberia!!!

I searched it up, and Russians only migrated there during the 1600's or somewhere along that, which isn't long enough to develop their own genetic signature, sort of like Colonial Americans. How do they detect this?

Also, what is the actual migration possibility of this? It was my 2nd Great Grandma, who was adopted out of Lithuania, who then moved into Germany, where the rest of that side of my family lived until moving to America.

If that's real, that is crazy cool!