I don’t remember my passcode I’ve changed it and now it’s locked out

Then the support article you arrived here from should provide you with the steps you will need to take to regain access to your phone. Basically, you will need to restore it. That process will completely erase the phone and you will have to restore your phone's data from a backup.

It's really old fashioned, but you might try writing down the next passcode that you set up......even if you are sure that you will never forget it.

Keep the passcode in a safe place in your desk.