Previews are displayed in the waiting room

Since v6.5.0, previews have been displayed in the waiting room, but can they be hidden?
Also, I would like to disable the microphone and camera icons in the preview by default. Is this possible?
I tried executing the API added in v6.5.5 before starting the meeting, but there was no change.

{EED2ED00-19E2-47E0-8F87-CC10D718DA54}

The preview in the waiting room can’t be fully hidden as of now. Also, the mic and camera icons can’t be disabled by default before the meeting starts.

Are there any plans to add an API to hide the waiting room preview?
I think I asked a bad question, so I’ll confirm again.
The default setting for the preview is microphone enabled and video disabled, but is it possible to set it to microphone disabled? (It doesn’t matter if the icon itself is displayed.)

When I use presetAudioInWaitingRoom in the waiting room, the API will return SUCCESS, but mute will not be turned ON.