The course administrator is the owner of the account (owner role): they have full access to the educational process and to actions reserved exclusively for them.
They edit the course and lessons, manage students, check homework, configure teacher and student permissions, comments, and course texts. Only the administrator manages the product's purchase list, student passwords, pausing classes in the list, transferring lessons between courses, and teacher salary tiles.
The head teacher is a different role: he has a broad learning area, but financial and administrative actions remain with the administrator.
To view administrator rights for a course, open the course and go to the learning process settings, to the "Teacher Access Rights" and "Student Access Rights" blocks.