Some people only like dead stagnant scientific studies that support their ideologies. [talk to a “race realist” for a few minutes and they’ll pull them out]
If you get your genes done, go to https://www.gedmatch.com/ [or the genesis beta if you use the new 23andme] and get your “admixture” mapped out. There’s a few dozen ways.
It’s complicated stuff but you can start to see the patterns yourself on your own genes.