u/EuphoricOpportunity2

I went to a local shop for a charging connector repair and it came back like this. I showed it to the guy but he said it was probably a setting issue. I reset the phone but still . I made him reopen it but he said he couldn’t see anything wrong on the hardware side . What to do ? I am worried that the guy is incompetent and will just do more damage.

Also when I turn it on the brightness is normal when the Apple logo is coming on. Also in some apps that have a lot of dark it appears normally a split second then back to this weird look. According to general—> about the screen wasn’t changed