[amelius]

Can this same algorithm be used to find doppelgängers?

[ddeck]

There are plenty of sites for that:

https://twinstrangers.net/

https://www.ilooklikeyou.com/

https://www.twinlets.com/

https://findmydoppelganger.net/

https://www.twinfinders.com/

etc.

Disclaimer: This the result of a "find my twin" search. I know nothing about the credibility of these sites.