>why would such a reputed app not their own tracking status correctly displayed?

Reddit isn't down for me, so it's likely that something unrelated to Reddit could be down (like a misconfigured ISP) causing Reddit to show down for a lot of users.

Status page has been updated; “Investigating - We are currently investigating issues loading Reddit primarily affecting iOS devices.”

The Reddit app is notorious for being terrible, and it's only getting worse. Use a third party app.

Maybe this particular disruption is local to you, like a routing or DNS issue. Try a VPN to elsewhere.

It's not down for me.