Red Dead Redemption 2 Online question

I have recently started playing this again and now with friends online on PS4. Still getting our bearings we hang out in Free Form in a temporary posse and do the few missions available. I say ‘few’ because the majority of missions available are the orange ‘stranger’ missions which we can’t seem to do together. One person will click on the mission and no one else in the posse can watch the cutscene and are not included in the payout for successful completion. The person who signs up for the mission turns red on the map and we can see to stop it though.

Are we doing something wrong or are Stranger Missions just not available for collective posse play?