Currently in Telegram, when a live stream is active in a channel, or when a voice chat / video chat happens in a group, then an animated small overlay (which looks like a waveform) is superimposed over the avatar of that channel or group in the list of chats.
My suggestion here is that the scheduled live streams (or scheduled voice chats / video chats) should be treated similarly: some small overlay with the corresponding meaning (for example, looking like a clockface) should be superimposed over the avatar in the list of chats when a live event is scheduled in the chat.
Both of these small overlays (for live events and for scheduled events) could also be propagated further and appear superimposed over a folder when a live event happens (or is scheduled) in one of the chats in that folder.
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