SlingStudio supports live-streaming in all of these ways:
You can also live-broadcast from a PC or Mac computer that is connected to the SlingStudio unit's HDMI output port.
By the way: To connect your PC or Mac computer to the HDMI output port of the SlingStudio hub, make sure that you have an external encoder device that converts HDMI signals to USB/Thunderbolt—you need that to have the SlingStudio hub appear as "webcam" device on your PC or Mac computer.
Examples of such encoder devices might be any of these:
Note: SlingStudio does not currently support Facebook Workplace.