Hello!
I just started using KDE Connect and am blown away by the virtual input and ease of use!
However, I could not figure out how the “Use as drawing tablet” plugin is supposed to work. When i activate it on my phone, I can drag my finger across the screen but I receive no feedback on my desktop. I tried opening the Plasma Tablet Tester or Krita, but nothing happens. I also could not find any documentation online.
If someone knows how it works I’d be happy to know, it sounds like a useful feature! 
Thanks!