This is the best I can find, right now: https://us.forums.blizzard.com/en/d3/t/rod-fergusson-just-confirmed-no-chat-or-lobbies-for-console/42713/139
“Also, any regional locks on playing with friends on the same platform were beta only. Those will not persist for release. So Americas PS players can play with friends in EU for example.”
I did see a tweet or reddit post some time ago, that confirmed it as well, but currently can’t find it.