The issue affects PS4 players in Germany, Finland, France, UK and Eastern Europe and the US (east coast for sure). I have talked to people/friends from these regions - I myself am currently living in Germany. I think it is safe to assume it is a somewhat global issue. The other day a friend managed to connect to a EU server (only the gods know how) and invited me and we had a stable connection and playing experience. After 1 1/2 hours we got booted from the lobby and couldn‘t find another match for well over 20mins and decided to call it a day.
So servers are out there, just near impossible to find and connect to.