How long has it been since their spay/neuter?
Also, can you describe their litter box and cage set up?
There’s some detailed info on litter box training here: https://binkybunny.com/infocategory/litterbox-training/
I’ve noticed that pooping and peeing just outside the box can be due to the box being too small, or them sitting in the box and actually hanging their bum off the side. Or some rabbits will pee/poop anywhere they eat hay, so if they can reach the hay from outside the box, they will just toilet there.
Other buns will pee on soft things, and others will choose a place to toilet rather than the box specifically. One of my bunnies was driving me crazy because he kept peeing right next to the litter box (as well as inside it). I ended up just adding a smaller box right on that spot and it solved the problem!
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The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.