Searching your name and searching your face are different questions
Most people audit themselves by searching their own name. That finds what is labelled with your name — and it misses everything that is not, which is the part worth worrying about. A face-search engine has no interest in labels. It connects photographs by their geometry, so an unlabelled image on a conference gallery or a friend’s public album is fully in scope.
The practical difference: a name search tells you what is attributable to you. A face search tells you what is attributable to your face. The second set is usually larger, and you had less say in it.