Yellow blank screen on my iPhone 13 pro max

Hello, I have an iPhone 13 pro max which is under warranty. I have been using this phone without encountering any issue. All of a sudden, my phone turned yellow blank whilst watching a video on twitter without any physical damage to the iPhone. The phone has not been into contact with any fluid. The phone returned to normal after 3 mins after I put it to charge. Everything was fine until the issue came back again after 10 minutes. So I put it to charge again and this time the issue is persisting. I have tried hard reset, and factory reset using my MacBook but nothing seems to work. My iPhone has no cracks, no dents or scratch. The phone works but screen is yellow blank. Can I get it fixed under my existing warranty? and also is the warranty worldwide or it is just restricted to certain countries.