Hi guys I bought the adafruit nrf52840 I can't discover the bluetooth on my phone need help

I’m trying to make this https://youtu.be/lesxfWmiSqU
I’m using the neopixel rings thou

Which of the nrf5280 boards exactly?

What is it running? Arduino IDE or microPython?

What OS on the phone? Android or iOS? What version?

Have you read any of the documents relating to your board in the Adafruit Learning system?

E.g. https://learn.adafruit.com/introducing-the-adafruit-nrf52840-feather/update-bootloader

What have you done to find out what it is doing?

What code have you uploaded to the board?

Adafruit Feather nRF52840 Express
I’m using micro python

**I have flashed it **

**I followed all this **https://learn.adafruit.com/circuitpython-feather-ble-neopixel-hat/software