The team is quite good; they mostly self-organize. The ScrumMaster remembers that her facilitation skills were a necessary aspect of their success. That’s how the ScrumMaster improved their cooperation. That’s how she made them efficient.
Nonetheless, it’s the right time to move on and change the approach. All ScrumMasters should do is step back and let the team run the meeting. Don’t stay in the middle, don’t start it, and don’t indicate who’s next. Just be there, ready for facilitation with a lighter touch. Give them space and trust them. They will make it. If the discussion goes in the wrong direction, coach them so they identify the problem and adjust accordingly. Note that you are not disappearing at this time; you are still present, carefully listening, aware of what’s going on, and ready to help if needed.