StreamDeck is a controller accessory for a PC.
There are 2 different ways that a StreamDeck can be connected to SP.
Direct Connection
If the StreamDeck is directly connected to the SP machine via local USB, there is a StreamDeck object under the object tree inside SP.
Indirect Connection
If the StreamDeck is connected to the SP machine over the network, there is a Stage Precision plugin option within StreamDeck. For more details please refer to here: StreamDeck Plugin