Hello  @Grumpy_Dad 

Thank you for the feedback, if smart action -Schedule a Scene does not work as scheduled

You could try some tips here

1. Sync location & time on Kasa APP:

How to Adjust Time Setting in the Kasa APP

2. Go to Device settings, and confirm device time is on the same time zone as the APP time. 

3. Check if smart device is remotely online or is smart device is accessible in Kasa APP when phone is on  LTE mobile data or connect to non-local Wi-Fi network? If not, try to reboot smart device, or will need factory reset it to reinstall it in the app. 

If Schedule a Scene still does not take affect, please share smart actions settings photos here, the model of phone and its Andriod or IOS version,  and let us know MAC address of smart devices by private message. thank you.