When you land on o565714.ingest.us.sentry.io and see a plain 404 page, the first question is whether this is a dead link or something more concerning. In this case, the signals point to a site that simply doesn't present itself as a functional business or service. There is no about page, no privacy policy, no social media presence, and no way to contact anyone. The domain blocks search engines from crawling it, which is unusual for a legitimate site that wants to be found.
For comparison, any real service using a Sentry.io ingest endpoint would typically have a proper domain with documentation, support channels, and a company behind it. This subdomain has none of that. A 404 status combined with zero transparency is not necessarily a scam, but it is not a place you should rely on or hand any data to. Without knowing who owns the domain or what it represents, the safe move is to avoid interacting with it altogether until those basics are in place.