I believe 1:1s are counterproductive
Why wouldn't be anyone invited to a productive conversation? Or is it to keep secrets or extinguish promises?
Not everyone will be in every open meeting, but things closed doors isn't great.
Depends on team size and topics. If the whole meeting is to clarify or explain some topic about the task one person is doing, inviting a whole team and spamming calendars with niche discussion is also counterproductive.