OK I just saw another thread with the same query - I missed it when I searched before, apologies for duplicating.
As the admin for my team, I absolutely assumed I was setting team-wide things here as I have both github admin and Cursor admin permissions. We all want the same behaviour from BugBot and I never assumed everyone in my team would need to set up the GH connection, especially as the reviews started occurring for all team members as soon I had set it up.