I don’t know why this show to my phone everytime

Hi hammed277,

From what you've shared it sounds like you're experiencing an alert about your display. We see you've already checked out this resource About genuine iPhone displays. This link provides a lot of good detail, and this part should explain what you're seeing if you haven't checked it out yet:

"An Unknown Part  message will appear if the display installation is incomplete or if the display:

• Was replaced with a nongenuine display
• Was already used or installed in another iPhone
• Isn't functioning as expected

An additional message might appear that says "Apple has updated the device information for this iPhone." This means that Apple has updated the device information maintained for this iPhone for service needs, safety analysis, and to improve future products. 

These messages don't affect your ability to use your iPhone."

If your device requires service you can continue with this link: Get Support

Regards.