For grooming i read somewhere that if you wet your hands and pet them you will get scads of hair. Would she tolerate that better than a brush?

For digging, can you put another surface down on floor like carpet squares or those floor pieces that look like puzzles. I use that in my bunnies area. Then since she likes to dig in cloth give her some old towel or if room enough the comforter

As far as toys, my bun isn’t fond of toys either. I worry be doesn’t get enough mental simulation. I built him a digging box which he went to town on. And then he peed in it. So…im not sure what to tell you about toys. The only thing he seems to like are tp rolls filed with hay