Why does Xfinity advertise the "Apple Watch for Your Kids" feature but cannot provide it?

Apple Watch for Your Kids is a distinct service Apple advertises here:  https://www.apple.com/apple-watch-for-your-kids/

If you read the content, the idea is that the child does not need a phone/line to have an LTE enabled Apple Watch.  The watch is provided its own unique phone number and you pay just the data plan for the watch.  This allows you to set the watch up using the adult's phone but the watch will have it's own texting/phone contact information so it's not shared with the adult.

On Xfinity's website it shows you offer it:  https://www.xfinity.com/hub/mobile/apple-watch  (Half way down under Apple Watch SE).

I was on the chat with 5 different reps and one rep on the phone last night and none of them were familiar with this and said the only option would be to connect the watch to one of our existing lines, thus allowing our child to receive the adult's texts and phone calls.  This is not how Apple Watch for Your Kids works.  After one rep finally acknowledged that Xfinity doesn't offer this service, but hopes to some day, I had to process a return.  

If Xfinity does offer this service, then it would be great to get in contact with a rep who actually understands how to activate it.

From what I gather on these forums and through Apple's website (that doesn't list Xfinity as a provider as I noticed now), it's true Xfinity doesn't offer it and should remove it from the website.  Am I correct?