Sinusitis and bronchiectasis...
I have both and when I initially saw a pulmonologist about a CT that showed bronchiectasis and changes possibly due to MAC, the local pulmonologist thought the changes might be from micro aspiration of the secretions. The ENT doc was skeptical, though about month 5, he had checked and said it was possible. I did a search and found "sinobronchial syndrome" frequently mentioned, but mainly in very old Western studies or by more current Japanese studies, where it seemed a common diagnosis.
After MAC cultures were negative, the theory was that I'd had MAC and cleared it or it was from the secretions. My sinusitis was treated aggressively and cough dramatically improved.

After your question, I searched for updated research and found this. (CRS is chronic rhinosinusitis)

"In summary, this study is the largest to date examining the prevalence of bronchiectasis in patients with CRS. Overall, we found a significant and potentially under-recognized prevalence of bronchiectasis in patients with CRS. While additional studies are needed to further elucidate the complex interactions between CRS and bronchiectasis, physicians should be aware of these clinical associations and potential implications for both diagnosis and treatment of more severe comorbid disease."
It's from this study.
https://pmc.ncbi.nlm.nih.gov/articles/PMC11216716/