Why is my phone not touching

Well I will suggest to visit near repair shop or service center.

Yeah, if it fell into boiling water, the touchscreen is probably damaged even if the display still works. The heat/water can affect the touch layer or connectors separately from the screen.

I’d turn it off, don’t charge it, and let it dry completely rather than keep testing the touch. If it still doesn’t respond after that, I’d get the screen/connectors checked. Water + heat damage can get worse if the phone stays powered on.