pie has not been released for the note 8 in the US yet. At this point I dont think we will get another update on xfinity mobile. They stopped updates as of december even though there have been 3 security updates as of now and all other carriers have gotten those updates. Yet Comcast/Xfinity have not released an update for the Note 8 since December of last year!
Dont expect a comcast rep to even reply to your questions either. They dont have a clue on what they are doing here.
Don't know about the S8 Note, but I (S8) just went to Settings > Software Updates >Update Manually, enabled it and there it was waiting for donwload. Maybe X voice is waiting to dole it out in measured lumps for those doing Automatic Downloads. In Pie there is a complely new look to many things. Anxious to have a look at the new editing tools in Gallery.