Hi there! I’m a social media manager, and I’ve worked both for a large agency and on my own now.

Yes, they could post through your Creator Studio through FB, but personally, I’ve never found that to be ideal. If they need to connect to a third-party posting or analytics app, they will need your logins. And if any outbound engagement is part of their contract, having direct access to Insta is a requirement. There’s really not a lot they can do on Insta without those logins, aside from just posting.