Your supervisor is wrong. The Arduino Zero is a specific board:https://store.arduino.cc/genuino-zeroYou could consider the Arduino Zero to be part of the family of boards based on the ATSAMD21G18 microcontroller. Those include the Arduino MKR series of boards, the Arduino M0, the Arduino M0 Pro, the Arduino Nano 33 IoT, and some 3rd party boards like the Adafruit M0 boards.
You're welcome. I'm glad if I was able to be of assistance. Enjoy!Per