I apologize for the English, I used Google Translate to prepare this answer. Let's go:

I had the same question and asked Microsoft Learn about it and the answer I got was the following in this link;

https://learn.microsoft.com/pt-br/answers/questions/2127433/a-autoridade-certificadora-(ca)-para-apple-push-no

Apparently, we Azure Notification Hubs users do not need to take any action regarding this, but if you have more information it would be interesting.