If you're finding yourself with footage that has decent audio but no clap, you can easily sync it with DaVinci Resolve. We find ourselves using this function a lot when we do productions with the ATEM Mini at the center of the shoot. There tend to be elements coming in from all angles (board, cameras, dedicated audio recorders) and it's nice to be able to sort through all of it efficiently.
Of course, if you're live-cutting with an ATEM ISO, shooting on BMPCCs and doing post in Resolve, there are better ways to do this. But covering all of that would take more than a minute.