@Didida Hi everyone! I resolved the issue by accessing the Kasa Smart app on my Android device instead of my iPhone. Now, the valves are also visible on my Kasa Smart app for Apple!

@TonyStege I'm facing exactly the same issue!!! Since few weeks my KASA app don't show any device and KH100 SmartHub keep blinking orange-blu but the Wi-Fi connection Kasa_Hub_xxxx doesn't work....