Yeelight Pro S20 Gateway (BLE Mesh) how to get matter support?

I have updated my yeelight pro s20 gateway (BLE mesh) to v3.4.2.603, but I still do not have matter support. Unable to add matter devices when i tried to add it from my yeelight pro app, “No matter-compatible gateway detected. please add a Matter-compatible gateway (such as a yeelight pro s smart screen) and try again.”