What KAKU devices are you using? Are they RF 433MHz or Zigbee devices?
Both the app for 433MHz and Zigbee devices are maintained by Athom. You can always contact them via de contact details on the app’s app store page in case of issues or missing supported devices.
FYI, my recent experience with a KAKU Zigbee dimmer: KlikAanKlikUit ZCC-250 Zigbee Dimmer Plug.
