White replacement in science anyway is not happening anywhere in the world , it's to date just bull-shite and may never happen.
When two different Human races breed it's called out breeding. Very few children are born as the result of out breeding. The most massive majority of mixed couples never result in a birth because in science these couples are almost exclusively R selected so fast life history individuals and have far too much self interest overall in themselves to consider a kid, everything must remain about them alone.
the massive majority of these couples move on to the next mate and then the next and so on and in the very end settle with a mate of the same race and of course R selected again where they may or may not breed enough to replace themselves.
Heaps more to it but regardless, white replacement as in out breeding is a fallacy....a well understood urban legend.
