A doctoral resume doesn't have to be an undergraduate major.
The subject wants to ask, "can the doctoral resume not include undergraduate majors?" Of course. The most important thing for a doctor's resume is to highlight the relevant experience and research results in the doctoral stage and show his professional ability and achievements in this field. You can simply explain basic information such as academic qualifications, and you don't need to list specific disciplines and majors. A doctor refers to a person who has obtained a doctorate. Doctor's degree is the highest degree in postgraduate education, and it is usually necessary to continue further study on the basis of master's degree. After a certain period of study and research, it can only be obtained after completing certain academic achievements.