If I read this correctly, Whole-Body Vibration can be helpful if you use the plate during exercise. How much more helpful than "regular" aerobic activity is unclear. Vibration plates (frequencies and amplitudes) differ from those in targeted airway clearance devices.
https://pubmed.ncbi.nlm.nih.gov/36556991/
@bernadene24 I believe I watched the same video as you with one of our fellow sufferers using a vibration plate on which to exercise. If I remember correctly she uses the plate while exercising. Using the plate is not a passive activity. Anyway, as you did, I thought wow maybe this might help so I ordered one, which I ended up returning.

I realized that using the plate would be yet another, but possibly superfluous tool for dealing with my bronchiectasis. In other words, it would not replace nebulizer and airway clearance. It would add to the time I spend on AC. Perhaps they could be combined? The plate was frightfully heavy and there was a risk I could fall off of it. The manufacturers literature says it can be helpful for osteoporosis if it's used every day for 45 minutes. That seemed too much for me so I am back to my walking routine and lifting weights and of course airway clearance using autogenic drainage.