Hi again! I read your prologue, and I can see why you're a bit worried. I had the same struggle when I started my story for the contest. I'll give you my review; take it with a grain of salt, as I'm not a professional editor, just a fellow writer.
The prologue felt heavy and a bit lengthy. Readers generally like to jump right into the action, and your prologue has a lot of world-building and backstory that could be spaced out through the chapters. When everything is explained upfront, it can feel like all the information about how your world works is being dumped on the reader. It's different to explain what's happening versus showing it through action. For instance, in your prologue, you explain the portal on top of the mountain. Instead, you could start with a scene where people, like farmers, are reacting to it, talking about what they see in the sky. This way, you introduce that something imminent is happening right away. Then, you can start slowly from there. That way, you can show instead of telling.
I hope this makes sense. Here is a link to an article that helped me a bit. I think you need a subscription, but the info is really valuable: https://medium.com/practice-in-public/6-ways-you-can-write-a-first-scene-that-works-for-your-fiction-stories-d016efd44745
