If you get that to work, you’ll be the first. I’d also caution that, if you find a loophole, it might be closed in the future.
My impression of the way things are headed is that components are replacing child devices for zigbee/z-wave devices. I don’t expect to ever see official support for zigbee/z-wave child devices in Edge drivers. The difficulty right now is that components don’t provide the same user experience as child devices - they can’t be renamed, they don’t display on the app dashboard, they don’t integrate with voice assistants, and they don’t present well in the automation screens. I’m hoping that there’s work being done behind the scenes on those issues, and that there an update sometime before Edge moves out of beta that makes components more viable.