Not just you.
I have about 40 HomeKit enabled devices (Lutron, iDevices, August), and more often than not they are not found/available from my iPad Pro. In fact, the Lutron switches (17 of them so far) say they are connected to a different iCloud account.
So, Home is borked so far on iPad, but works fairly well on the iPhone. iOS 10b2.
My biggest problem is that Siri is slow to connect from the Watch, so controlling HomeKit devices with Siri on the Watch is very hit and miss.