Co-teachers cannot see a student list of who is attending and participating. This is a major issue and does not allow for the co-teacher to intervene in a virtual setting without having the lead teacher inform them of issues. This pretty much removes the necessity of a co-teacher and makes the co-teacher no more than a follow along with the ability to field questions about the current items.
Also, the co-teacher should have the ability to change slides without affecting the live presentation. This would allow the co-teacher to help students individually.
As it stands, the co-teacher is a spectator.