I want to change apple-id alias

Do you mean this? --> Add and manage email aliases for iCloud Mail on iCloud.com - Apple Support

Or this? -->

Here's how you change the email address (Apple ID) you use for your Apple Account while retaining everything in your account:

If you have an iPhone or iPad:

1. Go to Settings, then tap your name.

2. Tap Sign In & Security.

3. Next to Email & Phone Numbers, tap Edit.

4. Tap the Remove button next to the email address, then tap Delete.

5. Tap Choose Another Email Address and enter your device passcode if asked.

6. Enter the new email address, then tap Continue.

7. Enter the verification code that was sent to your new email address. Read this support article to learn what to do if you didn’t get the email —> If you didn't receive your verification or reset email - Apple Support

8. If you encounter issues with certain services after doing this, this outdated support article may still have useful suggestions --> What to do after you change your Apple ID or password - Apple Support