MQTT Not syncing all devices to Home Assistant (Dashboard Purpose)

I’m trying to setup a Dashboard in Home Assistant for a wall-mounted tablet.

90% Of al devices are working fine, but some of my (KlikAanKlikUit) wall-switches aren’t recognized as entity in Home Assistant. In the MQTT Hub app on homey I’ve selected every device. Also a KaKu-switch mounted in the powersocket isn’t recognized. Are some type of switches not supported with MQTT or should I search the answer elsewhere?

I’ve installed MQTT Client and HUB on Homey, and Home Assistant + MQTT Broker is running on my Raspberry Pi 3B+.