This is how the gallery looks like.
Add new row code:
Patch(S2T1_MeetingAgenda, Defaults(S2T1_MeetingAgenda), {Title:"", AgendaItem:""});
Collect(colMeetingAgenda, Last(S2T1_MeetingAgenda));
Remove item code:
Remove(S2T1_MeetingAgenda, LookUp(S2T1_MeetingAgenda, ID = ThisItem.ID));
RemoveIf(colMeetingAgenda, ID = ThisItem.ID);