I would like clarification on two situations I am experiencing with a device connected to my WiFi network created with TP-Link Deco X55 units (2 units).

The device is a Cosori air fryer, model CS318-AF, which has WiFi connectivity at 2.4 GHz and integration with Amazon Alexa. This equipment uses the VeSync app for its configuration and operation. When I first integrated it into the Deco X55 network, I had not activated the IoT network, so the air fryer was connected to the main Deco X55 network at 2.4 GHz (which I named EdWiFi01). The air fryer operated correctly and without issues on that main network. However, since this is an IoT device, after I activated the IoT network of the Deco x55 (which I named EdWiFi01_IoT), I wanted connected to this network. So I transferred the air fryer from the main network to the IoT network, changing the WiFi configuration through a function in the VeSync app.

After connecting it to the IoT network (EdWiFi01_IoT), the air fryer is also operating correctly and without major problems. However, although the VeSync app shows that the air fryer is connected to the IoT network (Image 1), in the Deco app it appears connected to the main network (Image 2), not to the IoT network.
 

       
Image 1                                                             Image 2

In addition, in the Deco app, the air fryer does not display the green WiFi icon to the right of the name, unlike other devices (Image 2). I do not know what it means that this icon does not appear as it does for the other devices.

Although the air fryer is operating correctly, I would like to know why it is not connected to the IoT network instead of the main network. I would also like to know why the green WiFi icon does not appear and what this situation implies. Why is there a difference to the rest of devices?

I appreciate your kind and prompt response.