I got this line at the screen bottom exactly like yours, in my laptop screen since 2 years ago, 2 years later i got 2nd and 3rd line at the bottom

Nothing we can do unless replace it
I just ignore it as it is located at the bottom, can’t tahan if located at middle

And yes, it will getting worse 1 day, sooner or later, 2nd line, 3rd line…..

Yeah luckily not middle part
As most of the time I won't staring the bottom, so be it

I got 4 lines now from 2 lines, all still within the taskbar "luckily"