They're much better about identifying matches at the college level than at the HS level, which is understandable. Sometimes they identify upcoming early-round HS matches on Twitter but not consistently enough that you can rely on it. I believe that they eventually identify all the matches after and make them available in archives though.
Now I feel dirty for defending Flo, which refuses to respond to my numerous complaints about their authentication. Their live stream bumps me for supposed IP conflicts randomly and without warning, reason, or explanation. That's what you get for your yearly subscription: deaf ears. Still, it's the only game in town for so many events that there really isn't a choice if you want to even try and watch those events.