Did Boba Fett's armour use durasteel or beskar?
Wookieepedia is vague.
Boba armour has no durasteel or beskar in Canon. For Legends, Boba Fett is also vague; however, it was passed down to Jango.
In Canon Jango did not use beskar armour:
However, (Jango) Fett's armor itself was fashioned from durasteel alloy, while most Mandalorian armor was made from beskar.
(Jango) Fett wore Mandalorian armor in the "shocktrooper" style common during his time, although instead of the more traditional beskar plating, he utilized the less resilient and less expensive durasteel alloy for his armor. (https://starwars.fandom.com/wiki/Jango_Fett/Legends)
However, The Clone Wars (T.V), Boba does not start wearing Jango's armour and the first time we get to see was in The Empire Strikes Back (ESB). I assume Boba kept wearing his armour for Return of the Jedi when he fell into the sarlacc.
The Mandalorian (Mando): Eventually, Boba Fett gets his armour and helmet; however, it is unclear whether it is beskar or durasteel.
I found this website which discusses the material it is made of: https://www.slashgear.com/mandalorian-s2e6-lets-talk-about-boba-fetts-armor-04649828/