With territory marking you just have to give it time. You still need to sweep up the poops and dump them in the box, and wipe up pee messes with paper towel and put that in the box as well, but territorial marking is very different beahviourally from normal pee and poop so it just may take a little bit while she settles in to he new home. Some take to it very quickly, others take a quite a bit of time to get the hang of it. At 10 weeks she’s still pretty young as well. How big is her litter tray? Does she go in the box at all in addition to the other places, or does she only go outside the box?
Depending on the breeder’s set up, if her previous cage had a wire bottom which allowed all the pee and poop to fall through, it could be part of the issue. In that situation a rabbit can go wherever they like and there’s no territory marking, or repercussions of sitting in their own waste. The change in living situations and have moved completely may just be throwing her off. I’m sure she’ll come around.