Many in the past have mentioned recliner for sleeping after surgery.
Probably helps with swelling issues as well as trying to get up & out of a flat bed..

I would request as much time off and light duty as you can get, just to be on the safe side , so employer isn't planning on you at 100% before you are ready for it. You can always do full duties earlier if you are up for it.

If they have to remove a lot of scarring that might be more invasive to the tissues than the rib removal, so it is hard to say any exact recovery time frame... some bounce back and some take longer..