Yep, still broken on PS5. I was looking forward to finishing the game after a couple months, but I guess I'm shelving it still. Maybe they'll fix it someday or I'll feel like replaying from the beginning someday.
I'm having the same issue, and unfortunately it means I don't have an alliance for the final mission. This needs fixed. Hopefully they will see this and do something about it soon. I'm putting off finishing the game because of it.