I had not heard of this, and the link you provided was interesting, so I jumped to my go-to source Google Scholar, and found this extensive 2020 article from the NIH - National Library of Medicine - originally from Biotechnology Reports, a self-publishing journal. Most of the authors are affiliated with the pharmaceutical company which manufactures the product.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7585045/
I found a lot of other articles too which talked about anti-inflammatory effects of the enzyme, potential anti-mucolytic effects, and possible anti-biofilm properties. There are also cautions regarding use with blood thinners, NSAIDs, asthma, etc.

So as with all supplements, be sure to check with (all) health care providers before starting, and buy from a reputable source.
Sue