APNs Certificate Update

APNs Certificate Update - Upcoming Requirements - Apple Developer

We are preparing to address the upcoming change to the Certification Authority (CA) for the Apple Push Notification service (APNs). We have a few questions regarding the necessary measures.

1. Is the change of the Certificate Authority (CA) related to APNs something that needs to be handled on the server that sends push messages?

2. In relation to the CA change, do we need to reissue the APNs certificate?

3. If we handle the CA change on the server side and the new CA certificate already exists there, is there no need to make any further changes?

4. If the server’s trust store already includes the new CA certificate, it seems that no additional changes are needed. Is it possible to verify right now that everything will function correctly?