I forgot my iPhone 11 password

Your Apple ID/iCloud password?

There is an Apple article that explains what to do if you have forgotten your Apple password. Click on the following link: If you forgot your Apple ID password - Apple Support

Your iPhone 11 lock screen passcode?

There is an Apple article that explains what to do if you have forgotten an iPhone or iPad passcode. Click on the following link: How to remove your iPhone, iPad, or iPod touch passcode without a computer - Apple Support

If that option is not available, you will need to use a computer. See:

If you forgot your iPhone passcode - Apple Support

or

If you forgot your iPad passcode - Apple Support