Ongoing bad smell in nose 21 months later - what could this be?

I had a Septoplasty/Rhinoplasty and turbinate reduction in Nov of 2020. I still had a bad smell in my nose at my 6 month post op appointment, it was treated with an antibiotic but the odor persisted. My surgeon didn’t think it was a big issue so I didn’t let him know it never went away. One year post-op, I told them again that the odor never subsided. He said everything looked good and chalked it up to allergies. Treated with a steroid, but smell still persists now sadly. At a loss.