I know more than I probably would like about CF but what I know is from 10+ years ago. From my experience, you cup both front and back chest walls since you want to get all lung surfaces. I did think it was odd she only asked him to cup her front and than it appeared he only did the upper chest wall (it is difficult to fully cup a female with breast, as the breast are a bit in the way. Also, you cup in sort of a rapid rhythmic style, not that pat, pat stuff he did. I doubt she'd be coughing up much with the little bit of cupping he did.
I think the average waiting time for double lung transplant is 2-3 years but why is she in podunk instead of a large city with a hospital that does lung transplants? Her dad would have a choice of where to move to when he immigrated to the states, I should think. He knew Emma would evenually need those lungs, and better that she be near the hospital to get there quickly plus you need to stick nearby for the 6 months post transplant. So, that's another odd thing I find about Emma's story. Couldn't dad have moved anywhere in the states, why choose marijuana central instead of a city with a well known med center transplant program? What even gave him immigration approval any ways? Is the US in need of taxidermists? Another odd aspect of the program, why is she even living in that town?