This domain is a subdomain of Sony's PlayStation Network, specifically an edge server for community events. Unlike a typical consumer website, it doesn't serve pages to users — it's backend infrastructure. That explains why you'd see a 403 Forbidden when trying to browse it directly; the server is set up to only respond to authorized requests from PlayStation apps.
For a site of this kind, the important trust signals are solid: clean blacklists, a valid SSL certificate from a reputable issuer, and fast response times. The only notable weakness is that it still accepts older TLS versions that browsers stopped supporting years ago. While that's not ideal, it doesn't make the server unsafe for its intended role.
Because this is part of the larger PlayStation ecosystem, the question 'is mx-evnt-edge.np.community.playstation.net a scam' doesn't really apply — you're looking at Sony's own infrastructure. There are no reviews because it's not a storefront or service you interact with directly. In short, this is a perfectly legitimate piece of the PlayStation network.