Yes, my bunnies have very limited interest in toys. I have spent a small fortune over the years trying out different kinds. Bunnies do play, but they often ignore toys. It’s just their nature to take it or leave it, or play for a few seconds, or lose interest, or ignore for months then discover a toy that’s been there all along. They just like to play at instinctive things that they would be doing, like digging, chewing, climbing, running or hiding. Some like to make tunnels in a blanket that’s lying around. They do like to start a project and finish it. Some like to redecorate which looks like a mess to us but is fun for them.
Stick with the natural, homemade and inexpensive toys. It may never be more interesting, but it’s not so unusual.
But do watch for any other signs, like lethargy, loss of appetite or not going in the litter pan. Then it’s an indication of illness and needs a trip to the vet.