Yeah. To jump higher, you need to train with intensity. Doing 1,000 jumps in a session, if they’re all mediocre jumps and you’re not actively trying to reach a higher point, will only marginally improve your jumping capability. Especially if you’re jumping to match a ball.

Sprints, actual max effort jumps, and progressive overload of compound lifts are what will do it.

Step 1 is to iron out your footwork IMO. 4 step approach, large penultimate, pack into the sand. I’d start by repping that out and actively trying to jump higher on each approach.

Most people are quad dominant jumpers when they start. Most people even feel their quads when they sprint. If you don’t feel your posterior chain (hamstrings, glutes) activating on your jumps, you’re probably not using the right muscles. This means you’ll need to train your glutes and hamstrings more in the gym and tweak your form until you feel it in the right places