I haven’t tried hip thrusts to know if it helps at all, but it sounds like it can as a good assistant exercise. It clearly allows resisted hip hyperextension to strengthen that motion (which doesn’t occur in squat) and personally, I’d be excited to try it because it seems more glute dominant than hamstrings and I think I have more hamstrings than glutes (I live with hamstring DOMS…). Although I’m no expert (yet) at this matter, I do know that sitted calf raises are more soleus dominant and standing calf raises are more gastc dominant, so because of knee flexion which causes shortened hamstrings, I think it would use more glutes.
Also, it would likely probably help more horizontal (sprinting, long jump) rather than vertical (high, VJ) because VJ doesn’t involve hip hyperextension and is more quad dominant.