First and foremost lets get this disclaimer out of the way:
Do not upgrade your iDevice to the public beta software unless you can afford to lose all your data and potential brick your device!
Now, having thrown caution to the wind (but having a recent backup) I installed the public beta of iPad OS 14 on my iPad Pro yesterday. One of the first things I tried is the Indigo Touch app and sure enough it works apparently flawlessly. Actually, all I did was check c
some control pages, look at the log and the devices tab. Everything seems to be there and working. Also, my Apple Home app continues to work just fine showing all my indigo Homekit Bridge created devices, which also function just fine.
Again, try this at your own risk!!!