Yes, but it's a bit different depending on whether you're talking about a Custom Section or a Managed Section.

In JumpRope, Custom Sections are sections that you or another teacher have created yourself, and are indicated by a + in the section code column on the Sections page. You can edit custom sections and add or remove co-teachers using the edit form.

A Managed Section is a section created by school administration, and is often imported from a SIS or other system. These sections will have "official teachers" coming from the SIS, and these cannot be edited in the gradebook. If your school setup allows it, you can add/remove additional teachers to the managed section by selecting "Change Co-teachers" from the item menu. These teachers will get the same access as an official teacher, and they will survive future data imports from the SIS. You cannot remove an official teacher from a managed section.

See also How To - Add Co-teachers to a Class