Why, I imagine so! Do you contend that the modern day members of Tribe Judah are the only surviving Israelites that can claim Abraham's covenant?
To claim an inheritance from deceased A, descendant B would first HAVE TO KNOW he WAS so descended, and that test is flunked.
I know what you mean of course, that when Elijah comes he will make these genealogies plain, and many non-Jews and anti-Semites will learn of significant Jewish bloodlines in their past, whether in antiquity, medieval ages, or modernity. Will they then claim something based upon that?
I do not know, but it is very, very, likely that the great majority of these have already historically been Christian and thus saved under another method. Those living today may have apostasised like their fellow-former-CINO's-- but they might be just as likely, if they suddenly "got religion," to "get" evangelical Christianity as Judaism, imho.