That is not an accommodation for which students can be authorized. Assignments are due per the course syllabus. If you have questions about extending assignment deadlines, you will need to speak with your instructor, as extensions would be considered academic decisions, not accommodations.
Please note, this is not meant to suggest that the request for an extension itself lacks foundation or merit, or that it would be inappropriate for the faculty member to authorize an extension if that is what they feel inclined to do. If your instructor declines to offer you an extension on the basis of it not being listed in your Notification of Authorized Accommodations email, please feel free to share this information with them and/or reach out to your Accessibility Specialist, and we can offer clarification.