Our 3v3 looks like six players following the ball

I’d give them a little help, but I would not try to remove the swarm completely. At U7, following the ball is normal. They are still learning that moving away from it can actually help. I’d use one simple question when it becomes really crowded: “Can you find somewhere your teammate can see you?” Then let the game carry on. You can also make the pitch slightly wider within the allowed range if the group genuinely needs more room, but I would try the coaching first. The useful learning is when a child moves away, suddenly receives a pass and realises why that space mattered. That moment is much stronger than us placing them in three neat positions. A bit of bunching is part of the process. We just want to start giving them reasons to discover the space.