What if you lose your password
I don’t remember my password
iPhone SE
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If you forgot your apple ID password:
If you forgot your Apple ID password - Apple Support
If you forgot the Passcode:
If you forgot the passcode on your iPhone, or your iPhone is disabled - Apple Support
If you have iOS 15.2 or newer you migth be able to use this guide that does not require a computer:
How to reset your iPhone, iPad, or iPod touch when you forgot your passcode - Apple Support
If you have a backup you can restore it from that
Restore your iPhone, iPad, or iPod touch from a backup - Apple Support
Good luck!