iOS as camera source in Mojave's Quicktime Player

I know previously in an older version of OS X (I think Yosemite) I was able to use my iPhone has a camera source in Quicktime Player app to record video from my iPhone "desktop".

I don't know if it's because I only have an iPhone 5s or because of Mojave but this feature seems to have gone away (at least for me). I think this stopped working for me in High Sierra).

Does this still work for anyone else still in Mojave? I can't find any information on this and if it's specifically been removed, or it's just because of my iPhone 5s. I'd appreciate to hear from anyone who can or can't do this, and what macOS / OSX and iOS device your using.

Again, this allowed me to see my iPhone screen on my Mac, and to record app and interactions on my iPhone and record them in Quicktime if I wanted.