During the Meeting
You established a committee, scheduled a meeting, created, and then published the agenda. Now it’s time to do the real work. It’s time to get together, discuss, and take action on the important issues. It’s time to have a committee meeting.
This is the responsibility of the chair. In small, informally-run committees, it is common for the chair to do it all themselves, but of course they can delegate it however they see fit.