Cannot connect to Aqara Wireless Remote switch via Mi home and gateway

Hi,
I have just purchased a Xiaomi gateway (DGNWG05LM), and an Aqara Remote Wireless switch, double rocker (WXKG02LM).
I registered and installed the Mi home app to my phone (Galaxy S7).
I could pair the gateway, and to the gateway as a child a Mi Wireless Switch.
However, I cannot pair the Aqara wireless switch. When I try to add it, the app remarks to the “Mi Control Hub”, that “The device is not compatible”.
Is there no way to connect this Aqara switch by this gateway? Must I buy another gateway?
If yes, which is the cheapest compatible?

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This is a problem with your Xiaomi gateway, you should ask your question in Xiaomi forum or ask the manufacturer directly. This is a forum for home assistant related questions.