Topic: i'm pretty sure boba is a mandalorian if you count legends.

while not speaking mandalorian, he does become the leader of mandalore in "a practical man" and most likely you'd have to be mandalorian to fill that role.

Check out our article called "'The Mandalorian' Season 2 Changed What It Means To Be Mandalorian:"
https://www.bobafettfanclub.com/news/fettpedia/the-mandalorian-season-2-changed-what-it-means-to-be-mandalorian/

interesting. so this is a question that has legends/canon issues and is hard to discern.