Don’t have a definitive answer for you. Had a lobectomy 3/19 and like you recovering well. From what I can tell from my doctors is that the remaining part of the lung does it’s best to compensate for that part removed. My oncologist suggested breathing as deeply as possible and then blowing out that breath as forcefully as able. He suggests doing this several times daily. Am going to start doing this—did today and coughed, but Inthink it might help. Good luck to you.