TELEPHONE should always be visible in the menu. If it is not there, pull the vehicle battery for 30 minutes.

Yes the device with the passkey is your wireless module. There are TCUs and ULFs, and they have different pairing procedures, A TCU is bigger. There are also different versions, not all are as reliable as the others, some early ones don't even support bluetooth, despite having the logo.

My suggestion would be to find the way to clear all previous pairings and then pair your phone.