My iPhone X screen freezes sometimes and turns black. Will my free AppleCare cover this? What will Apple do?

My iPhone X screen freezes sometimes and turns black. Will my free AppleCare cover this? What will Apple do? - 1

Could & should check them of course. Most here wouldn't know Apple's protocol.

AppleCare provides full support.

If your phone is faulty they will repair or replace it. If there's a known fault they can't yet fix then they'll confirm that and you'll have to wait for a firmware update. It is a brand new model and there will be hardware, firmware and software bugs.