How to access forgot-password option when you forgot the PIN of your Android Device?
You can go to google find my android page. Log in to your Gmail account linked with Huawei Nova 3i.
You get 3 option lock / unlock , erase and sound. Use unlock screen option. Now you can access mobile and change passcode. Or take full backup of mobile and restore it.
You can start mobile in recovery mode using volume and power button. Wipe Cache partition. This will remove passcode.