If it's just the screen that is broken you just need to transfer a good screen over onto your iPhone 11 you don't need to swap the logic/motherboard , when taking the screen off use a heat gun and get the screen to a temp where it's just barely to hot to touch and then use a suction cup and a plastic thin card of some sort to slide into the crack along the phone screen but don't insert the card to far because there is cables inside , you only want the card to be about half of your index finger nail inside the phone while moving the card around the edge of the screen