Password
My iPhone won’t let me change my password, what can I do to change it?
iPhone SE, iOS 15
won’t let me change my password
When you try, did you get an error message?
Try again, see this Apple article: If you forgot your Apple ID password
If you forgot your Apple ID password - Apple Support
Then see this Apple article: What to do after you change your Apple ID or password
What to do after you change your Apple ID or password - Apple Support