Does each node in a Wi-Fi mesh system broadcast its own separate SSID?

From previous experience of both setting up and managing Wi-Fi extenders, my understanding from carrying out scans of the 2.4/5GHz bands is that each extender broadcasts its own SSID – however, I’m less familiar with consumer mesh systems. Assuming that a mesh was set up that included 4 nodes, would carrying out a scan at the time the mesh was running show a single SSID or 4 separate SSIDs all broadcasting the same name?