The reason why I give this answer is that the time for different schools to get diplomas may be different, which needs to be determined according to specific circumstances. In addition, it is a common time to get a diploma about one month after graduation ceremony, but it may change for various reasons. It is recommended to consult the relevant departments of the school in time.
If you haven't got the diploma after the time, you can contact the academic affairs office of the school or the graduate employment guidance center to understand the situation and provide your own relevant supporting materials, such as student ID card, ID card and proof of payment. So that they can help query and solve problems. If you have any other questions, you can also consult or ask for help from the relevant departments of the school.