Twenty minutes on how connected the team felt, not on what it shipped. Distance is not only kilometres, and a distributed team loses the signal long before anyone mentions it.
This retro is about how connected we felt, not about the board. No delivery talk for twenty minutes.
Everyone drops a number from 1 to 5: how connected did you feel to this team this sprint? No explanations yet.
Go around: one moment the signal was strong, one moment it dropped out. Moments, not moods.
Pick the single change that would lift the weakest signal, and give it an owner.