The big secret: Different human populations are actually just different hybrid compositions of ancient hominids. All have "Homo sapien" as a common mixin, but the other populations mixed in were way more diverse.
Different modern human populations have indeed different trace amounts of genetics of other lines of humans, but it’s „homo sapiens sapiens plus 1-4% homo sapient x“ for all of them.
The Wiki page is a good source of references: https://en.m.wikipedia.org/wiki/Interbreeding_between_archai...
For example, an African person can have 0.1% European genes and still may look fully blonde with blue eyes and European facial features.
What matters is what that 0.1% is bringing. If those genes are largely not affecting anything at 20% well then why we should care if it's 0.1% or 20%
"but some countries and backgrounds have a maximum of 3% per human. The average is about 2% outside Africa."
as mostly false
https://www.sciencedirect.com/science/article/abs/pii/S10406...