Add device not working here in SmartThings app


[What i need?]
I need to add my smart device on Samsung SmartThings.

[What I’ve Done? What am i doing?]
I’m trying to add a smart device in SmartThings app on my Android Device. I tried to clear data and reinstall the app but without effect.

[Which Device?]
About the smart device, it’s a “lighting” (Smart Light Bulb) from Izy Smart / Tuya Smart.

[Response in SmartThings app]
When tried to add devices of any of theses brand (Izy Smart / Tuya Smart), it was showing in both the same message “Devices connected to this account can be controlled in SmartThings”, but i cannot see this device added in SmartThings app.