Rolling

I don't think it's the diaper that's holding him back. My twins hit every mobile milestone early with cloth diapers. They don't restrict movement. But it could be that being naked is super interesting to him. So many different textures and sensations. And that wearing clothes is less interesting. Honestly I get that. Clothes are lame.

Essembly are an AIO system yeah? So they’d be a lil bulkier than other cloth nappies like pockets. Maybe give him some nappy free time on a waterproof picnic rug while awake though. My babe rolled early at 3m (and Sat unassisted at 5m) but we used pockets w 1 insert and at 6m I started putting 2 inserts for day. Get a foam mat or rug for the lounge room, my baby was a floor baby he was just always on the floor on the foam mat he was never in anything at home at that age he had a playgym that he whacked but I didn’t have bouncer or swing so he learnt to roll early

We had essembly and my little one rolled and crawled just fine (full disclosure we stopped cloth because we were also potty training big brother andi couldn't deal with all the laundry)