Well, actually, is my brother's iphone 11.
But, he hide my iphone when I need it! So, I decided to make a joke with him.
I used MagFone iPhone Unlocker to remove the passcode, and I sent a picture to his friend.

Kizito55:

Please can you also unlock an Iphone 7plus that was reset and locked with an unknown cloud password and ID?

Try MagFone iPhone Unlocker, it's really amazing. 'cause it can not only unlock iCloud, but also remove apple id.
https://magfone.com/

In order to ensure the privacy and security of iPhone, we usually set the phone lock screen password, including 4-digit / 6-digit password, fingerprint lock or face recognition lock, once you forget the password, repeatedly lose the wrong password will be 1 minute, 5 minutes, half an hour, etc.
To disable the iphone, how to do when you encounter this situation?
You can use MagFone Unlocker tool, which can remove it in a few minutes.
You can also enter the icloud website, log in to your icloud account, click "Find My iPhone", locate the iphone for a bit, and then select "Wipe iPhone" inside, so that iPhone will also wipe the lock screen password at the same time.

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.

Face ID brings convenience to you. However, if you suddenly run into iPhone Face ID not working problem but you don't remember the digit passcode or you only set up a Face ID, the locked iPhone will get your life into a jam.

Well, you could check Face ID unlock condition or check your iPhone ( Restart/Force Restart iPhone - Update iPhone) .Of course, you slao can remove it with some unlocker tools. There are many iPhone Unlocker softwares on Google, such as AnyUnlock, MagFone iPhone Unlocker, ApowerUnlock, etc.