if you are new to racing, most important is to try things and find/learn your limits. In this specific case, 1k all out was maybe too much, maybe it would have worked if you went at 800 to go. maybe it would have worked if you paces a little better (same kick, but safe some for the final meters). These are all things to test the next time your in a similar situation and build your experience.
For what it’s worth, 1:10 648 watt is pretty nice and more than average for cat 4/5 I assume, I’m not from the USA, but my 1 minute power pr is way lower and I think my FTP (not skills and tactics as I’m not a crit racer) or w/kg is enough for a higher cat at 300/4w/kg, but maybe I’m wrong 