Samsung Galaxy S21 Ultra flickering screen caused by small drop

About a month ago, I dropped my Samsung Galaxy S21 Ultra about 10 cm above my sink, and it got a small dead pixel on the left edge near the top. The problem is that it has affected the whole area below the impact point, doing so that every time the light intensity gets too bright, for example, if I am accessing a white webpage with light intensity of 100%, the area below the dead pixel just turns black. But if I have the light intensity set to 10%, I can see the screen but the bottom area is still flickering. I thought I could live with it, but I can't use my phone outside if I can only have the light intensity on 10%. I know it's something to do with the screen, but I think it's weird that the top works completely fine, and everywhere beneath the impact point is broken. So I hope that it could be a loose cable or something and not the whole screen that has been destroyed due to a small dead pixel. My question is, do you think it could be a loose cable or another thing I could fix without buying a new screen that costs 270€? Because if that's the case, I think I will just hold on for another month and switch to a new phone.