How to set Px4 to a precise waypoint?

I need to use Px4 to get the plane past the waypoint and throw it.
It’s a requirement of a competition event, but the Px4 I set up can’t fly over the waypoint accurately, it’s just skimming.
Is there a problem with my task settings or what parameters need to be adjusted?
Attach mission planning document:
https://cowtransfer.com/s/1844262f18bf41