Best answer by Max
So sorry to hear and see the damage to the back of your P20 Pro :(
You can have the back glass replaced at our authorized service center. Please note that external damage is not covered by the warranty, so the repair would proceed as an out of warranty, chargeable repair.
If you wish to know any further details about the repair procedure, please send me a private message. To send a private message, simply click on my name in the discussion post and, in the new page that appears, select "Send message".
Looking forward to your reply!