Earlier this month I noticed that I can no longer verify my Apple ID password when asked on my iPad Pro 2nd gen, running iOS 13.4.1, meaning I can't download apps or even update existing ones. When I enter my password incorrectly, it does tell me it is incorrect, but when I enter it correctly, the process just times out.
My other devices are on iOS 17 and 18 and they still seem to connect to Apple servers fine, so I was wondering if I could get any clarification they have officially deprecated iOS 13, or if maybe otherwise there was a certificate I could install to fix the server connection.
(And, no, I would prefer to not update the iOS, to keep compatibility with older apps I installed. My device on iOS 17 is an identical iPad Pro model and is still being updated.)
Edit: It seems this post was processed to be categorized as "iPadOS 17". Please excuse this as I can not change it; this is about iOS 13.