Devices not found

I cannot find any devices while trying to create a scene! I have 6 eWeLink Remote smart switches. But I don’t see it when adding a scene, either in trigger or action! Why?

Sorry, is it 433MHz switches with gateway 433Mhz ?
Than creating scene you need to select gateway first.

It’s 2.4Ghz I also have a gateway but don’t see it either!