You could try rubbing perfume on the baseboards. I learned this trick from my vet. Now I can’t stand strong scents so remember you don’t need much. But I spray just a tad on a paper towel and you can rub it on the places you want them to stay away from. I had to refresh it every few weeks. Note: For some bunnies this did not work so you just have really watch and see if it works for yours.
Edited to add: There are bitter apple sprays that worked for two of my bunnies, but with Jack, he actually was drawn to it. HOWEVER, there used to be a Grannicks bitter apple cream/gel and Jack hated that. I think it was the heavy gel/cream texture that just stuck to his tongue and he would stay away from anything with that on it. As Jack has aged, he doesn’t seek out things to chew on – he’s satisified with his toys so I don’t have to worry about it anymore, thank goodness.
A previous member/leader had success with pure lemon oil and/or rubbing lemon rind on “NO NO” things to chew on.
Let us know what ends up working for you.