Tbh I took that as him intentionally being hyperbolic to make a point
Some European populations are almost interchangeable, so yes. However, it gives the rough idea. If you plot with Bulgarians, you could be Romanian, maybe a significantly southern shifted Serb, but not Spanish or Norwegian.
Bosniaks, Circassians, Turkmens, Kurds, Levantines, Albanians... All are equally Turkish. In Turkey, you cannot say "you are not ethnically Turkish because you are of Circassian origin". If you say so, you are f.cked up.
Turkishness has nothing to do with genetics.
You should probably accept that you are genetically more of a Balkan Slav than a Turk. But that does not negate your Turkish national identity. I have noticed that you often bring up this issue
In that case they would have been mix with Ukrainians over generations, and eventualy will plot within Ukrainian cluster, and away from Swedish one.
I dont know why your Bosniak grandparents after they moved to Turkey remain ghettoized and didnt mix with ethnic Turks.
That is how it is. You cannot change past, but can influnce on future.
You can find ethnic Turkish woman so your children be half genetic Turks.