Certain payment acceptance channels and/or methods have new requirements, and some have been removed. In addition, many of the existing requirements now include new controls. What will change for your business depends on your SAQ (Self-Assessment Questionnaire) type.
Your SAQ type will determine how these changes impact you. Guidance on your SAQ type is available here.
The compliance portal journey has been designed to factor in all changes and ensure that you are reporting against the latest version of the standard.