So you have a few problems going on. She's been given too much space too soon before litter training has had time to be somewhat established. You have carpet down, yes? That's also a problem because that gives her a soft surface to pee on. Hard flooring surfaces are better for preventing this(but not necessarily always). Also the litter box, if that light blue bin is a litter box, where is the litter? If there's no litter in there to absorb the pee, then that means when she tries to pee in there it will get on her feet, which rabbits don't like. So it's no wonder she would rather pee on the carpet instead, cause it's not getting on her feet when she pees there. Rabbits don't usually like their feet getting wet, which is why they usually won't pee on hard surfaces and would rather pee in a litter box when it is set up with plenty of litter to absorb their urine.
And there's hardly any hay in it. You need absorbent rabbit safe litter on the bottom of the litter box, with plenty of hay on top or in a corner of the litter box. If you can't get hay cheaper(such as from a farm or livestock feed store) so you don't worry about her peeing on it and wasting it, then you need some sort of hay rack or bin next to the litter box, so she has to sit in the litter box to eat hay. The hay rack needs to be large enough and have wide enough bar spacing for her to access the hay easily and it needs to be only accessible when she is sitting in the litter box. You may also want to have her pellet dish only accessible from the litter box as she will also poop while she eats those.
So I would reduce her living space until her litter habits have improved, change the flooring to a hard surface, such as putting down a cut of lino with edges outside her living area so she can't chew on them, and improving the litter box setup. Or possibly restricting her to her cage for a few weeks to see if it helps the litter habits. But for this to work the cage would need to have the proper set up. Either a smooth flooring surface in it with a litter box with litter and hay, or the whole cage as one large litter box. But you have to have plenty of litter in there. If there's nothing in there to absorb the urine like in the blue litter box in your picture, why would she want to go in there to pee. The point is to have something to absorb the urine so it doesn't get on her feet, which is why rabbits don't like peeing on hard surfaces usually. You also want her forming an association of knowing where ever that litter is means that's where she should go to the bathroom.