[Unity 2021] Setting the Default Icon via script?

Hey there! In Unity 2020, you could set the default icon in the Project Settings with this code: `PlayerSettings.SetIconsForTargetGroup(BuildTargetGroup.Unknown, new Texture2D[] {defaultIcon});` However, in Unity 2021, `PlayerSettings.SetIconsForTargetGroup` is marked as deprecated and it's recommended to use the `PlayerSettings.SetIcons` method. But that doesn't seem to be having the desired effect. Trying to set the icon for `Build.NamedBuildTarget.Unknown` just results in a console error and setting for any other platform doesn't change the icon shown in Project Settings. Does anyone know how to do this now in Unity 2021? Thanks!