I think I have found the problem with the edge driver. If only the Shelly Gen2/3 Device Driver V1.7 is installed the Smartthingsapp do not find the device. If the driver Shelly Gen2/3 Device Driver V1.7 and Shelly Device Driver V1.9 is installed, the shelly was found and it is possible to change the driver from V1.9 to V1.7.