One day, your iphone needs a password, and you forget it 'cause you often use Face ID. What should you do? 、
Don't worry, you can try these methods.

1. Ask the Apple Store for help
The most direct way.

2. Remove it with unlocker tool
MagFone Unlocker
EaseUS MobiUnlock
...
They can help you easily remove screen passcodes, Apple ID, MDM restrictions, and Screen Time passcode.

3. Use "Find my iPhone" feature to erase the password
Prerequisites: Make sure your iPhone has the "Find My iPhone" feature turned on and that you remember your Apple ID and password.