It's not going to be unusual to find corona virus circulating at any time and, as others have said, there was a nasty virus circulating late summer last year, late summer flu isn't uncommon, it probabaly was a coronavirus, could even have been the precursor to covid-19. But it may be a stretch to say it was its first wave.
The more information we can get on all of them, how they progress the better.
But we don't need to read anything into any of the data just yet... that will take some years.
What would we do differently now if we found an earlier outbreak? We would know more, but that wouldn't change what we are doing now. It would be useful for future research, future response plans, future vaccines etc.