The problem may be that the manufacturer Aqara has revised/modified the Single Switch Module T1. As part of this process, the device has also been given a new (internal) ID, which is stored on the chip and/or in the firmware, but the device is still being sold under the same name “Single Switch Module T1”. Consumers are usually unaware of such changes and are often unable to check them beforehand.
However, if you want to add the revised/modified device to Homey, Homey cannot recognize it because it has a new and unknown ID. Therefore, the device is not assigned to a specific Homey app, but is added as a “Generic Zigbee Device.”
If the Aqara app developer adds the new ID to the Homey Aqara app, the device should work without any problems. However, only the app developer can say when and if he will do this.