XFinity Voice Account port to a different Account for XFinity Mobile

I have a landline for phone number [Edited: "Personal Information"] that I need ported from my Xfinity Voice account (Carrie [Edited: "Personal Information"] Account # [Edited: "Personal Information"]) to an Xfinity mobile (Google Pixel 6a) account that is in my son’s (Tyler [Edited: "Personal Information"] Mobile Account # 6733) name. 

This Google Pixel 6a, IMEI [Edited: "Personal Information"] is an inactive 4th line (for me to keep the phone# I’ve had for 24 years) on Tyler’s mobile account that needs to receive the landline port from my account.