I'm not sure what you mean by that, there's a plugin that adds FindMy network support to Home Assistant that seems to be up to date. If you mean Google doesn't support them, I'm also not sure what you mean by that. The app is on my phone, up to date, and tracking devices, same as the Apple network, just with Google devices. If your issue is Pebblebee, there are multiple different brands you can buy from depending on your needs, but generally, a tracker is a tracker.
As far as how well they work to track lost items, I'm honestly not sure, as I haven't lost anything yet. They should be comparable to an Airtag, as they can ping off of all Android devices unless someone opts out.