unlocking my phone

If your device has iOS 17 and you just changed your passcode you may be able to use a previous passcode→Temporarily use your old passcode when you forget your new passcode on iPhone or iPad - Apple Support

If your device has iOS 15.2 or later installed, you can reset it without a computer; check out this link→How to reset your iPhone, iPad, or iPod touch when you forgot your passcode - Apple Support. Otherwise you will need a computer:

See this Apple support link→If you forgot the passcode on your iPhone, or your iPhone is disabled - Apple Support

Or watch this companion video ⬇️

After restoring the phone using one of the methods above you can restore your most recent backup.