Task: In Connected devices setting turn on the bluetooth & pair it with Nothing phone 1 device
Steps:
go back to settings homepage
click on Connected devices
click on connection preferences option
click on the Bluetooth option 
click on Use Bluetooth toggle button
click on Pair new device
click on Pair new device
scroll down to find device to connect
scroll down to find device to connect
scroll down to find device to connect
scroll down to find device to connect
scroll down to find device to connect
click on Nothing phone 1 device
click on Nothing phone 1 device
click on Nothing phone 1 device