My iPhone XR's screen is flickering at random times.

Hello everyone,

My iPhone XR's screen is flickering at random times and going back to normal, it started happening last week I suppose. The flickering is not something too big but noticeable, unfortunately. I tried to turn off auto-brightness and forced it to restart as advised. The issue is still there, happening at random times for 5-10 seconds and it seems like a hardware issue. Any ideas?

Extra Information: I bought it on the 7th of July, 2020.

It has a screen protector on it.