My iphone 12 fell in water

So recently my iPhone 12 fell in water and I took it out as soon as possible not more than 10 seconds, at first it was working just fine so i played the water ejecting sound, after about 20-30 mins its shut-off on its own and wouldn't start back up, while starting it back up it made the sos noise for a second with the flashlight flashing once but wont start, then later it stopped doing that also, now after 4 days when i tried to connect it to my computer it vibrated like it does when we connect the charger, and did the same sos sound and flash again but wont start.

Please help me

P.s :- I put it in rice, its been there for 2 days