Ubisoft has said that phase 2 is under development and aims to roll it out by the end of 2022. As per the official statement, phase 2 will have the group play feature that will support cross platform play.
However, they have not yet confirmed whether For Honor will have cross progression or cross save functionality.
This may not go down well with some of its ardent fans who have been playing the game for a long time and would like the option of switching between different consoles.