Remind me, is he neutered? If not, it’s definitely time and will help.
If so, then he sounds like he has a project he likes. A bunny will go back to a project day after day. It mimics their work of making a burrow over time by working on it day by day. They are kind of wired for projects sometimes.
You might try keeping him out of his favorite room for baseboards and get him a Maze so he can explore and chew that.
Another thing to try is a spray of 50/50% vinegar and water spritzed on the baseboards. The smell should be offensive to him, but you won’t smell it at all. Then substitute a chew toy.
I’ve also taken seagrass mattes, the flat ones (in BB’s store) and cut them into long strips about 3-4″ wide and lay them on top of the carpet against the baseboards. You could try to velcro them to stand up to block the chewing area. They will cover the carpet/wood that’s tempting, but if chewed, are very safe. I’ve never used the velcro because my chewers were more into pulling carpet edges, but a few dots should help it stay in place. You want to make it unappealing so he gets interested in something else instead.
Just make sure he’s chewing and eating normally. It may be a tooth problem coming to light.