Password change

Change your Apple ID password

1. Tap Settings > [your name] > Password & Security.
2. Tap Change Password.
3. Enter your current password or device passcode, then enter a new password and confirm the new password. ... 
4. Tap Change or Change Password.
5. Sign in with your new Apple ID password to access Apple features and services.

Change your Apple ID password - Apple Support (IN)

Kkface88 Said:

"Password change: I need to change my password for my apple ID"

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If your iPhone is locked, read the following...

Troubleshooting a Locked iPhone:

Your iPhone is locked. So, get this serviced.

Hold it Right There!

Being Locked Out...

Enter the passcode incorrectly too many times, and you'd likely be locked out for good. So, hold it right there, and refer to this link: If you Forgot the Passcode on your iPhone, or your iPhone is Disabled - Apple Support. It would be the one you've always entered. If you do not know it, then look for it in a location you may have stored it in.

No Success?

Contact Apple support:

If you cannot get the above link to work, then contact Apple Support.

Apple Contact Info:

• Contact Us - Choose Locations
• Proceed from there, as necessary
• Why the Wait: Phone calls are taking a bit to go through at the moment, due to lots of calls. With the Coronavirus Pandemic, many are at home at the moment, with much time on their hands to contact Apple. So, just stay on the line, and you will get through.