I recently bought an original iPhone SE in hopes of using a smaller device. But I can't use it for anything worthwhile because I can't sign into an Apple ID due to having encrypted backups on my account, which was introduced in iOS 16.2. The SE only supports 15.8.5. So I'd have to disable encrypted backups for all of my other devices in order to sign into my account.

Why am I unable to use Apple Music on my device while I can use it from a web browser or from an android phone that don't have encrypted iCloud backups enabled?

Unfortunately this also prevents me from jailbreaking the device because I have to sign into an Apple account in order to trust a developer certificate on the device required for the jailbreaking tool. It's my device! Let me approve of the certificate without an Apple ID!