The Apple Root CA I see right now expires Feb 9, 2035. If that's the one you mean, it looks updated now.
DanN3
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Post
Replies
Boosts
Views
Activity
I found this other forum thread which might be relevant. https://developer.apple.com/forums/thread/774009?answerId=824326022#824326022
Or maybe just contact AppleCare with your proof of purchase.
Is it possible you could have bought a stolen phone? Or perhaps your serial number was transposed somewhere? Perhaps if you post your serial number someone at Apple can look it up.