Summary: It depends on the school policy and your relationship with the school teachers. You should be able to apply for exemption or late defense. If the reason is justified, as long as it is not particularly bad, it will not get stuck in the paper.

Stylistically speaking, it is also a meaningful paper for scientific research and exploration of practical or theoretical problems in a certain professional field. Generally arranged in the last academic year (semester).

Thesis:

The topic of the thesis is designated by the teacher or put forward by the students, and determined with the consent of the teacher. They are all theoretical and practical problems raised in the development or practice of this major.

Baidu encyclopedia-graduation thesis