How do I change the 6 digit verification code on my Apple devices
How do I change the 6 digit verification code on my Apple devices
Do you mean a passcode? Click on this link to learn how to use a passcode with your iPhone, iPad, or iPod touch --> Use a passcode with your iPhone, iPad, or iPod touch - Apple Support
Enter a new six-digit passcode.
If you mean a two factor verifification code,I believe that is randomly generated each time one is required. You can't change it as such.