IPhone fell into water

If it's not working, make an appointment at the genius bar of your local Apple Store. They will examine it and explain your options.

Also see: About splash, water, and dust resistance of iPhone 7 and later - Apple Support

I have had that happened to me before leave it in rice you might laugh and say I’m crazy but it works

cover your phone in rice in a bowl and leave it while you’re sleeping and wake up to it working

You’re welcome!😁😁