Maybe it's a bit of a delayed reply. The problem was solved by enrolling my organization instead of enrolling as an individual in the Apple developer program.

Firstly, thanks. From the link you provided, I understand that if the entitlement “com.apple.security.get-task-allow” is true, I will have problems with the notarization process. Is this correct?

As you said, both your message and the support team's constant use of the same phrase "Your case has been escalated to the engineers, and they're working on it" are not helpful. But thank you for your efforts.

As you said, both your message and the support team's constant use of the same phrase "Your case has been escalated to the engineers, and they're working on it" are not helpful. But thank you for your efforts.