Passcode for OTHER iPhone
My iPhone SE was submerged in water and is no longer working, so I purchased an XR. I have a notification to Update my Apple ID Settings. I am prompted to enter my Apple ID Password and my XR's password, both of which work fine. However, I am then prompted to enter the Passcode for my Other iPhone. When I do, I'm told that I entered the Incorrect Password, and get the following alert, "The passcode for "---'s iPhone" was entered incorrectly too many times. You can approve this iPhone using another device or reset your end-to-end encrypted data." My Options are to click "Use Other Device" or "Reset Encrypted Data." Reset encrypted data wants to delete everything on my iCloud. Use other device gives me a spinning icon that looks like it's waiting on something. When I look online to try and determine how to use another device, it looks like I'm supposed to Go to Settings > My name > iCloud > Keychain and this is somehow supposed to help me (side note: Keychain looks like it might be a password repository, which I don't need as I use another app for this). However, I don't have a Keychain option when I follow these directions. I'm at a loss here. I'm entering the correct passcode and the phone doesn't want to recognize it, so I'm stuck. How am I supposed to finish updating my Apple ID Settings if the phone won't recognize my passcode?
iPhone XR, 12