White lines on Macbook Air M1 Screen after 8 months of used

Hi, I am just new to using Macbooks and I am used to windows laptops. However, upon using my Macbook Air M1 for 8 months now, I notice that there are some white lines on my screen like the whole screen has. You can barely see it if you're leaning backward in your chair but if you are working and using it for a couple of minutes you'll really notice the lines. I hope someone could help me fix this. it has not been damaged physically like it's in perfect condition, never been checked or wet or fallen.