I need help u locked my self out of my iphone 13

You will need to restore the device using a computer. The process will erase the device. Later you can restore your data from a recent back-up. Instructions here…

If you forgot your iPhone passcode - Apple Support

Apple invokes a huge penalty when you forget your screen time password or passcode.

It might be a good idea to write down the new info that you set up, even though you might be sure that you will never forget the password or passcode.