Any student can take up the AP course and exams without being enrolled in a class. However, to write the IB exams, you need to be enrolled in IB classes. Therefore, yes, IB students can write the AP exams.
Adnan Answered question October 8, 2022
Any student can take up the AP course and exams without being enrolled in a class. However, to write the IB exams, you need to be enrolled in IB classes. Therefore, yes, IB students can write the AP exams.