To an extent, you may need to experiment with what may or may not be interesting to your rabbit.
I use very tight/short-looped carpet squares from the hardware store– the kind that people use to remodel basements and stuff. The carpet is really tough to bite against because it’s very tightly knit, and that has worked with one of my rabbits who is a monstrous fabric chewer! As mentioned, experimentation is needed. So with my fabric chewer, I also realized there cannot be any exposed edges or lips she could get under to start tugging at, so I had to buy enough to floor the entire area. I also use cat scratchers to cover edges as well.
There are heavier hay and seagrass mats that can act as added textured flooring too!
It may not be as textured, but a large sheet of cardboard could be a good foundation. Since it’d be cardboard, you could also poke holes into it to maybe use natural string to hold any hay mats in place too!
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.