Is this a screen problem, or a iGPU problem?

A couple months ago, I was using my MBP as normal, and it started doing this out of nowhere: https://imgur.com/a/W3QaJeu

I guess this is a screen issue, but I was wondering if it maybe was a problem with the iGPU or something. And I don’t know if it has anything to do, but my original charger died a couple weeks before this, and I started using a third-party charger, could that have caused my problem?

Anyways, in case that it is indeed the screen, if anyone has any tips for not so expensive screen replacements, I’m open to listen.