My iPhone overheated and now won't turn on
I went waterskiing with my phone. I placed it in a waterproof case. But when I checked my phone after the first activity, it was filled with salt water. The phone was still operational, but I removed it from the case to allow it to dry. It turned off and began to overheat while drying. I let it cool down for a few minutes before turning it on. It won't turn on, and I'm afraid it's water damaged. I've had my phone in the water before, but it never behaved like this. I'm not sure if it's because the water is salted that it's done this. I took out the sim tray to let it dry and put it in rice for about 12h now. Does anyone know what I should do further? Or should I bring it to an apple store?
[Re-Titled by Moderator]
iPhone XS Max, iOS 16