My daughter was able to unlock my iphone 11 without effort at all and I was surprised its that easy despite the advance technology iphone has, theres still defect if I may call it. Quite disappointing. I want to know where to raise this.

Hello melissaidago,

Thanks for asking the Apple Support Communities about Face ID.

1. This article has information and talks about family similarities and recommends using a passcode to authenticate instead: About Face ID advanced technology - Apple Support

"The probability that a random person in the population could look at your iPhone or iPad Pro and unlock it using Face ID is approximately 1 in 1,000,000 with a single enrolled appearance. As an additional protection, Face ID allows only five unsuccessful match attempts before a passcode is required. The statistical probability is different for twins and siblings that look like you and among children under the age of 13, because their distinct facial features may not have fully developed. If you're concerned about this, we recommend using a passcode to authenticate."

2. To disable Face ID: Set up Face ID on iPhone - Apple Support

"Turn off Face ID

1. Go to Settings  > Face ID & Passcode.
2. Do one of the following:

• • Turn off Face ID for specific items only: Turn off one or more options: iPhone Unlock, Apple Pay, iTunes & App Store, or Safari AutoFill.
  • Turn off Face ID: Tap Reset Face ID."

3. You can also provide feedback on this feature if you wish: Apple Feedback

Thanks and have a wonderful day.