While genetics might play a small role for very specific reasons (eg a society thats prone to sickle cell disease will likely live shorter), there’s no such difference in large, diversified populations like US/Europe.
And most of the US gets a lot more sun exposure than most of europe. Also African americans...Well just black people in this context are more than twice as likely to get prostate cancer (more like 3 times given lower detection i've heard it said) supposedly because they have higher testosterone.