Professor has an informal in-person final scheduled even though it was never formally posted on Student Access. Is this even allowed?

basically title. I’m taking a class this quarter and the professor is incredibly all over the place and is scattered to such an infuriating extent with her curriculum and class structuring. the worst thing is, she doesn’t even update the syllabus, so if you miss a class and don’t have friends in the class, you’re cooked. quite literally during week 9, she drops the bomb that we have an in-person presentation final, even though this was never formally specified on student access, or even the syllabus (which doesn’t matter regardless.. because she doesn’t update it).

is this even allowed? I feel bad for students in the class who have another final taking place near or during this informal final date. because of how fucking disorganized this professor is, none of us would have even had a clue about this final date as, once again, it’s not formally listed in the system, and she shared this information with a week of class left in the quarter. if this is worth reporting, who should I contact?