So, I'm trying to figure out what to use as a Home Hub for the HomeKit integration. My wife is the lone iPhone user in our house. Everything else is PC/Android. I don't have an AppleTV, HomePod or other iPad to designate as my home hub. I do have an old iPhone6 running iOS 12.5.6 that I can pull out of my antiquated electronics drawer. But that doesn't seem to support being a "home hub".
Is there anything else that I can use as a home hub? Or do I need to start shopping for an old iPad?