I want to create an essay quiz where the teacher can give feedback then the student can respond to the feedback by updating their answer id this possible even when a quiz is closed or is there another way?
many thanks in advance
This is an interesting idea.
This is certainly not possible at the moment, using standard Moodle featuers.
It is the sort of thing that it might be possible to develop as an add-on. Specifically it would be a new question behaviour: https://docs.moodle.org/dev/Question_behaviours, a bit like https://moodle.org/plugins/qbehaviour_deferredfeedbackexplain, but different.