I have created a Photoshop document that is optimized for making streamdeck icons. It works in a way that I only need to design 1 icon and the rest change automatically to match. Some work is still manual but most is created to be as efficient as possible. They are even automatically named when I export to PNG. This is very important since I create hundreds of icons in each set.
I have achieved this by using the tools in Photoshop such as artboards, smart layers, and just some wise naming.
A Stream Deck is a device connected to a PC that can execute commands. It has customizable LED buttons to indicate what command is connected to what button. As the name indicates they are commonly used when streaming to control the stream. It makes it easy to start the stream, end the stream, change the screen, etc. They can also be used in different games or be used to control media such as videos or music.
Since it is possible to customize the buttons to match the command, this has created a market for stream deck icons.
I love creating icons and setting up these kinds of things. Here are some of my static sets. (I also create animated ones)