These arrows appear to be from the Xingu region. They are quite distinctive in the short length and the bindings at the fletched ends. The examples I post pictures of are listed as coming from the Paracana, Arawete, and Asurini. Source Museum fur Volkerkunde Dresden.
all you need to now is here,
https://pib.socioambiental.org/en/Povo:Asurini_do_Xingu