We Don’t use the Apple ID for longer. If your email address ends with @icloud.com, @me.com, or @mac.com, you can’t change your Apple ID to a third-party email address. You also won’t see Change Apple ID on your account page or the option to delete your email on your iPhone.
Here to Fix it:
1: Go to Settings.
2: Tap Profile Picture at the top.
3: Apple ID page will appear, Click Sign Out from Apple ID.
4: Then, Enter Password if needed and Turn OFF.
5: “Keep the Data Copy in iPhone”, now click Sign Out.
6: Go back to Settings.
7: Then, Enter Apple ID and Password to Sign in.
So, the above Solutions helps to solve the Apple ID Email that you no longer access.