iCloud
I forget my passcode of my phone or someone change it but my information are still in contact with my phone
iPhone 13, iOS 16
To unlock your iPhone, follow the steps described in the Apple article: If you see an iPhone or iPad unavailable message or Security Lockout screen
If you see an iPhone or iPad unavailable message or Security Lockout screen - Apple Support
or someone change it
If other people have access to your iPhone or other Apple device, change the device passcode and never share it with others.
Change your Passcode -> Use a passcode with your iPhone, iPad, or iPod touch - Apple Support