The hard poops - dry little balls - they often go wherever, but the soft poops - cecotropes - rabbits usually poop those straight into their mouths (gross I know). So you rarely see those as they usually just eat it right as soon as it’s coming out.

My two rabbits back in the day always peed in their litter boxes, but we’d often have to vacuum up their dry poops, which were usually right around their living areas mostly. And for the cecotropes (soft poops), we usually didn’t see those unless the rabbit was feeling sick. Since normally they go right back through their digestive system for a second pass.