Discover what apps are using a ChildDevice in code

[dondo]

Is there any way to discover that a (child) device is in use by other apps?

I have an app that creates child devices based on various inputs. Sometimes it removes those devices. I'd like to make sure it doesn't remove a device that is in use by other apps (eg. RM). In 2018 the answer was "no:"

Discover what apps are using a device in code

I'm reorganising the devices that my app has created to group them as children of one of two other child devices, but I'd like to inform the user where those devices are being used so they can more easily substitute the new device. So my question is: Is there a way for an app to discover where a device is being used? Or is the only way to view the device settings to find the usage? Even a way of counting the number of uses would be helpful.

... but I thought I'd ask if it was still true four years later. I don't need to know which apps are using the device, just that it's happening. (I'd want to know which apps, but would be satisfied with knowing that it's happening.)

[To satisfy the inevitable "you don't need to do that, you're obviously doing something wrong" responses, sure, maybe. My app defines recursive groups - that is, device groups that can contain device groups, and propagates events to all contained devices. Because the UI is a PITA, I'm playing with doing this in a JSON spec that I download via HTTP rather than as a UI-driven application. You may love Hubitat UI development; I choose not to. ]