Even if the ADA applies, and even if the student is ADA eligible, the school did make accommodations. Being ADA eligible does not allow the student or parent to make the demands or set the accommodations, they are only required to make accommodations that don’t change the life activity and they do not have to adjust their standards. A student may need to sit in the front of the class or have more frequent breaks or need extra time on exams. The school does not have to accept that the student can’t attend class 2 or the 5 days a week the class meets, or that the student can’t do the labs. Adjust the labs? Yes, but not excuse them entirely. I’ve been through IEP accommodations with schools that are a joy to work with because they really do want the best for the student within their standards. I’ve fought it with other schools and those situations are never ideal and never become even ‘good’ because everyone is always trying to protect turf and so much energy is spent fighting nothing gets done.
In this case, it sounds like the minimum the school can accept is the work for the English classes to confer a diploma. OP said it’s been a month and daughter hasn’t done the work. The work has to be done in order for the school to issue a diploma. Someone has to move first.
I guess if the OP has an alternative, it’s time to make the suggestions. What would you, OP, think would be the best way to handle it? If the school said your daughter could return, could she in fact return? Would she still have doctor’s appointments and continue to miss classes.