Microsoft seemed to have ninja-ed in an update to extend the deadline for scheduling a certification exam. The article (https://docs.microsoft.com/en-us/learn/certifications/skilli...) now states "The exam offer must be scheduled by December 30, 2021.* Exam appointments must be completed by December 31, 2021."
By the way, I also want to share the tip I got from a God-sent friend about listening to Mozart and binaural beats while studying because I have successfully passed two certification exams (both on my first attempt) utilising this method. I have been listening to the brain-boosting music from this YouTube channel: https://www.youtube.com/channel/UCt-OPv1UjXh_Nn61RJpI87A
Good luck and best wishes to all