It works fine after all and the classes are overwritten. I accidentally applied print in the extension, which does not log in the Xcode console. But when I log for example: os_log(.default, "Received request to fetch rooms in home: (String(describing: home))"), it is in the console on the Mac under the iPhone tab.

Same problem with matter: [Ble] BLE:Error writing Characteristics in Chip service on the device: [The specified UUID is not allowed for this operation.]

same problem - you found this problem?

if add device with matterSupport where I get the matterNodeID?

is overrides the functions but, how I can communicate with mainApp and the requesthandler Extension?