Currently wrote a workaround for keyboard input into a InputField using this script : https://github.com/FusedVR/VRStreaming/blob/master/Samples~/Blockchain/Scripts/RemoteInput.cs
However, it lacks proper simulation of text input i.e. selection delete. This issue has been reported in Unity-Technologies/UnityRenderStreaming#542
Will Remove RemoteInput script once this is resolved in the base Unity Render Streaming solution