The thing is, my university said that my LOA is for Fall 2022 / Winter 2023, which means that I can start my program in any of these two semesters without even informing them. That is, there is no official deferral to Winter 2023. So, I do not think the university can issue me a new LOA. At the same time, I wonder if it means that I still have an option to request an official deferral for Fall 2023 (in case we get a refusal and the re-application takes much time). If that is not the case, it would make the things more complicated as I would have to go through the admission process all over again without any guarantees.