I haven’t read all of the following, and can’t answer any questions or objections that you may have about this, but these articles claim that DNA studies are being used to identify Jewish men who are deemed eligible for the Levitical priesthood in Israel today:
The Cohanim - DNA Connection
https://aish.com/48936742/
DNA Studies Trace Jewish Priestly Lineage From Biblical Times
https://israel365news.com/301195/dna-studies-prove-existence-of-biblical-priestly-class-health-and-science/
Jewish Priests, Biblical Status Confirmed By DNA, Ready to Prepare for Third Temple
https://israel365news.com/315998/dna-testing-aiding-prophetic-return-priestly-covenant/
Priestly Gene Shared By Widely Dispersed Jews
https://www.sciencedaily.com/releases/1998/07/980714071409.htm
Deemed eligible, not proven.
“The rabbi [Yaakov Kleiman] noted that genetics will not have the final word.”