Sometimes space and toys is a bit of an over simplication. For example, if you gave a child an empty warehouse they could run around a lot but it would get boring pretty quick. Rabbits don't run laps so if you don't give them reason to use the space then it's often wasted.
For example in the wild rabbits use space for grazing. Do you spread food out over the whole enclosure or does she just have to check her bowl - if so chuck out the bowl. They also often have different levels, they'll jump up or move around to get a better view of their environment. Provide different levels and change the view
Another thing rabbits use space for is chasing/interacting with other rabbits. Once neutered and paired up you'll find they use the space better. In the meantime move around her enclosure and 'play chase'.
Toys are very important but they can easily get boring. Rotate what toys she has. Clean them so they smell like they are new and invent new toys and games.
Direct the boredom behaviours into activities. Place her hay on top of the mesh so she reaches up to pull strands through to eat instead of pull at the mesh. Provide a digging box to dig in.... that sort of thing
For example in the wild rabbits use space for grazing. Do you spread food out over the whole enclosure or does she just have to check her bowl - if so chuck out the bowl. They also often have different levels, they'll jump up or move around to get a better view of their environment. Provide different levels and change the view
Another thing rabbits use space for is chasing/interacting with other rabbits. Once neutered and paired up you'll find they use the space better. In the meantime move around her enclosure and 'play chase'.
Toys are very important but they can easily get boring. Rotate what toys she has. Clean them so they smell like they are new and invent new toys and games.
Direct the boredom behaviours into activities. Place her hay on top of the mesh so she reaches up to pull strands through to eat instead of pull at the mesh. Provide a digging box to dig in.... that sort of thing