Have an option to start a voice/video call in DMs but no one is notified so it's like a silent start call

The silent call button should either be right next to the start voice call button or the start voice call button could have a drop down arrow and then the silent call button shows up. The silent call button could have two versions one for voice call and video call so both of them should have the same drop down arrow thingy. The silent call button would start a voice or video call but no one is alerted/notified that there is a call going on but you can still see in the group that there is a call happening.