I’ve had the smart things hub for a long time…added some tp link outlet minis in the past and they wouldn’t easily integrate with the app so I didn’t install the rest. Finally saw kasa/tp link could be easily added to the smart things app yesterday.
Linked my kasa and smart things account and the outlets were now listed in my smart things app!! Very exciting.
So I added a new tp link mini outlet…and it will not cross over to smart things. I’ve tried for hours. Uninstalled and reinstalled both apps.
If it was added to the Kasa app before linking to Smartthings, it should show up in ST. It may be tricky when you are adding additional TP-link devices afterward.