A tile or piece of cardboard may be best. I have a carpet chewer/digger as well. Sometimes she gets into ‘funks’ where she really wants to get a certain area, so I’ll put a sheet of cardboard there or try and redirect that energy to other toys. For her, I use packing paper (i.e. kraft paper/cardboard paper) and hold it while she chews and claws at it.
In addition to material prevention/management, you can also consider spaying, if that is something you have not thought of/she’s not yet. Since she is a baby, I assume not. Even without chewing behavior, spaying female rabbits is highly recommended because of their high chance of developing uterine cancer by 3-4yrs of age. Spaying also eliminates experiencing fake pregnancies. Chewing and digging are behaviors that can also see a reduction as a result of spaying.
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.