p178-mcc.icloud.com isn't the kind of site you'd land on by accident. It's a technical subdomain hosted on Apple's own servers, and it returns a 404 error. So if you're wondering whether it's safe to visit, the short answer is: there's nothing to visit. The connection uses a valid Apple-issued certificate, Google Web Risk shows no threats, and the domain lives inside Apple's infrastructure. That's about as clean a signal as you can get for a dead URL.
What about the missing contact info, privacy policy, and about page? For a consumer-facing business those would be red flags, but this isn't a business — it's an internal service label. Apple doesn't need to publish terms of service for a server name that was never meant to serve a webpage. The same logic applies to the lack of a Wayback archive: archiving services don't crawl technical subdomains that return 404s.
If you're doing a scam check on p178-mcc.icloud.com, the evidence says it's legitimate infrastructure, not a fraudulent site. But it's also not a site you should expect to load. Consider it harmless and move on.