Comment by reaperducer
3 hours ago
Why can't you log into iCloud?
Ask Apple.
I just tried it again.
"Can't Use Your Apple ID on This Device
Your Apple ID can only be used on devices running iOS 15.0 or later, or macOS 12.0 or later. This iPhone can't be updated to the latest software."
I think that might be a thing with apples Advanced Data Protection if you have it enabled, which is understandable since the software needs to know how to un-encrypt the data. If you don't have that enabled, then ignore this and assume apple decided to kill a whole lot of devices (particularly their macs, I know a surprising amount of people still on 10.15)