In distributions that include 4.x series kernels, pcie is detected and the built-in broadcom wireless chip is functional with the wl driver.  

 

I would like to move to a 5.x series kernel, but I noticed that pcie is not detected at all, and though wifi is detected with the brcmfmac driver, it will not function to scan or connect to anything.

 

I grabbed the latest image from this week (have tried many previous, including building my own armbian image) but no luck. Has anyone gotten these items to work with a 5 series kernel?

Nope 

@bobjones58 Why does hardware feature XY work in old kernel but not in more recent one? - https://docs.armbian.com/User-Guide_FAQ