[cypher]

Are the photos of your current set up? It does look quite empty for such a big cage, you could make better use of the height by making some free standing shelves, it's useful to have the wheel on a shelf & gives you more room for substrate & a digging or sleeping area underneath, you could use things like bendy bridges & tubes to give her more areas to explore & places to hide things.
As long as the base is full to the top with substrate that should be enough for her to dig in really & I'm not sure that you'd have that much more space for substrate allowing for the height of the wheel & things that need to go on top in the detolf.
She may be happier in a tank style cage like that but I do think you could try adding a lot more to the cage you have to see if she'll be happy with that.
Those hanging ladders are dangerous btw so I would remove those.