I did, yeah. I have 3 activities, and each one involves the TV and receiver.
By default, the power button for each device is "Power toggle", but I'm concerned the devices can become out of sync, like if one of them goes to sleep. Don't want to get in a state of toggling them to have one be on and the other off. So then I tried putting each device's "Power on" button in the Power on action, and likewise for off. But like I said, these actions don't do anything. Could be my device mappings? I have an LG C1 tv and I picked the first LG TV button set. /shrug