Q: why is my text message coming from icloud and not from my phone number?

How to add my phone number in the Settings / Messages / Send&Receive / Start New Conversations From?

I need to add this because when sending text messages, the receiver says that it was coming from my icloud without showing my phone number.  I tried switching off/on the imessage to no avail.  Also tried switching off/on facetime and cellular data and still nada.  Thanks for your help here guys.