In long distance flying strike.
Player can perform heave attack during flying strike. If press melee right after the flying strike.
From some angle, Yamato also flies back far away after the melee.
Feels like this can be a feature. But the animation is not consistent for the current game version.
If press melee right after pressing upper cut. Bibop is able to perform charge melee.
It is difficult to test it as the enemy flies away.
But able to clearly see the heavy melee damage when perform in sequence: uppercut -> heavy melee -> Hook within like 0.5 second.