Why isn’t CORS covered in the material?

cross-origin resource sharing (CORS) is listed on the AWS Sample questions for the exam,  but I didn’t see it covered in the course content. Did I just miss it?

https://d1.awsstatic.com/training-and-certification/docs-sa-assoc/AWS-Certified-Solutions-Architect-Associate_Sample-Questions.pdf

https://docs.aws.amazon.com/AmazonS3/latest/userguide/cors.html