I have both a NRF52840 Feather and an ItsyBitsy NRF52840 Express, and I'm trying to make the BLE HID Keyboard example here work:

This does not seem to work on CircuitPython 6.0. I have updated both the Itsybitsy and the Feather to CircuitPython 6.0, and installed the 6.0 libraries as listed (adafruit_ble,adafruit_bus_device,adafruit_hid,neopixel.mpy,simpleio.mpy).

Any ideas what might need to change?
Seems this was made for an older version of Circuitpython, since it was released in January 2020, and I'm trying this on 6.0.0 in 11/20. I can't seem to get any of my Windows PCs, Android, or iOS devices to recognize either device when trying to pair it.