How do I fix white screen issue on my iPhone 13 Pro?

A few days ago my phone was glitching suddenly. I tried resetting all settings and forced restart. After 2 days, it completely went white; when I clicked the power button for some time, it came back to normal, then went to a white screen after 2 minutes.

Now my phone is only white screen. I could see only a bit of wifi signal, time, and battery icons at the top. I could unlock my phone with assumed touch and even pick up calls and turn off the iPhone; everything is working fine, just the screen is white.

What could be the issue? Does anyone have an idea? As I am in Bangladesh, I can't take it to the Apple Store.

[Re-Titled by Moderator]

Original Title: 13 pro white screen but touch and everything working