Why is bun chewing on her hutch?

[Abi :)]

Hey guys, my bun keeps chewing on her hutch, it is indoor, and it extremely large, (6ft by 5 ft) and she isn't locked up in it either she is completely free roam in her room with the hutch in it, she has plenty of toys like willow balls, chew toys, and unlimited of small pet select timothy hay, so it's not the sort of situation where she doesn't have enough space, and i'm pretty confused why she does it, I thought maybe its because of her age (9 months) and also maybe because she hasn't been spayed (due to vets only doing emergency surgeries now), thanks in advance <3

 

[Preitler]

It's a rabbit. That's what rabbits do. You can give her something else to chew on, like tree branches, or some soft wood board draped so that's slightly in her way, or with a little distance to the pen panels or wherever she likes to chew.