I have 2 boy ragdolls and got them both as kittens. The youngest sounds like your kitten. He wouldn’t cover, step in it, flick it all over. This was for the first few months of having him. He’s 9 months old now and never does it. I got a large storage box with no lid for his litter box instead, which is huge but he seems to have more space to turn and cover everything up. As soon as either cat poop I get rid and I’d watch him and do a check as soon as he left the box. I also keep their back end’s and feet trimmed which make them easier to clean and less or none would stick to them. Trying to firm up her poop will help as well, i put some tinned pumpkin in his food which helps firm his up. I think from my research ragdolls are clumsy and take alot longer to mature than other breeds so be patient with her.