The trunk of the 2019 automatic luxury model won't open! What's going on? Can any experts help, please?

Fold down the rear seats, and you'll see a square cover above the rear door lock. Remove it, insert the key into the keyhole inside, and turn it to open. I encountered this too. [I want to be alone]

It might not be resolved here, but going to a 4S shop or a repair workshop should definitely get it fixed.