iPhone 7 screen replacement cut off Taptic Engine and has ghost touch

I repaired my stephdads iPhone 7 with a new lcd.

The first issue that appeared was ghost touch.

I fixed that with Elec. Tape on the 3D IC on the back of the screen which fixed it happening all the time.

Now the time of typing the phone has ghost touch when overheating appears i.e. playing intensive games.

-Phone battery has a low health, it’s 78%

-Phone’s water damage indicators are red but already checked everything with a microscope for corrosion and there is none, it’s most likely that it’s from shower steam

-Phone has been used and charged with 3rd party chargers

-Phone’s lcd backplate has a weird pop up ??

-Phone’s Taptic Engine doesn’t work anymore ??

Could someone help me solve this because this goes above my knowledge and I already ordered a lot of parts just in case so I am able to replace everything except the motherboard, if that is the problem I rather buy a new phone for him.

thanks for Reading!