iPhone dry out?

Yes. It is toast. Call your local Apple Store and make an appointment to examine it. Afterwards they will tell you your alternatives.

Putting the iPhone in the freezer was a very bad choice. It probably finished the destruction started by the water.

Rice is a desiccant (albeit not a very good one) but frozen water does not work with a desiccant - a desiccant absorbs water vapor, so the water has to be liquid so it can go to vapor phase for absorption.

But regardless, water damage is very rapid - as soon as an uncovered energized connection or circuit gets wet, it shorts out damaging the hardware beyond recovery. And corrosion occurs very rapidly too, in a wet and electrified system.

So simply drying out a wet electronic device is never likely to recover it.

Why would you ever put your phone in the freezer?

you do understand that water expands when it freezes and becomes ice, right?

if the water inside the phone freezes, it’s not going to leave the phone through evaporation.

if your screen doesn’t work, take it into Apple to find out what your options are.

The freezer?! OMG Almost certainly ruined. And not covered by warranty. Sure hope you have AppleCare+.