I somehow got my hands on a Adafruit Feather M0 WiFi with uFL - ATSAMD21 + ATWINC1500 long ago and just found it. I saw this:
Please note, there are no CircuitPython/MicroPython drivers for the WINC1500 (and there are no plans to make any).
So that limits my uses as I have to devote so much time to c++ otherwise. #iot microcontroller