Resetting Apple ID password
How do I reset my Apple ID password on my iPhone?
iPhone XR, iOS 13
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How do I reset my Apple ID password on my iPhone?
iPhone XR, iOS 13
Did you mean passcode. If yes, see Use a passcode with your iPhone, iPad, or iPod touch
https://support.apple.com/en-us/HT204060#adjust
If you meant password use Change your Apple ID password https://support.apple.com/en-us/HT201355 as indicated above.
Here is What to do after you change your Apple ID or password https://support.apple.com/en-us/HT204071
If you forgot the password, enter the Apple (iCloud) ID and click Forgot Password.
I forgot my password and need to reset it. Still can’t figure it out
If you mean the password, did you try the two links I posted?
Resetting Apple ID password