Yeah, they once told my wife this "expect students to show up in person", when she was pregnant and not all the time well. The result? Thrown out of the self paid language course at university with no refund.
But in the US, colleges have offices for accommodations. The faculty isn't required to do anything unless the university, acting through that office, tells them to.
Source: my career spent working with this kind of institution and this kind of office.
The school should have had information about that in the syllabus.
Either way, with appropriate accommodations, in person classes can be flexible as well.