Does mulberry root have any effect on bronchitis?

I have poor bronchial health, so I often get foreign substances in my throat and occasionally have a lingering cough.
In particular, when you are in a dry place or go outside to a cold place, the lingering cough worsens.

And before sleeping, I cough up a lot of phlegm from my throat.

Has anyone experienced the benefits of Mai Men Dong for bronchitis symptoms?

I found that Maianthemum racemosum helps prevent dryness in the bronchi, keeps them moist, suppresses coughing, and restores the function of the bronchial mucosa.

Are there any other good methods to improve if I often experience lingering cough and phlegm like me?