I’ve tested this with log in and you’re right - I do now get the in-meeting UI.
However, joining a meeting without logging in DOES show the in-meeting UI with the old Mac Electron SDK. With the current SDK, the in-meeting UI not being shown is a side effect of the meetingstatuscb callback not being called, meaning that when the user joins meeting and is not logged in, then there is no way to get the status of the meeting and for our app to show the appropriate UI depending on the state.