Flight simulator guys do awesome things with their Stream Decks. Some have instant graphic feedback displaying the info from shared memory like simhub. Unfortunately, there is not much info on the sim racing side. I did see examples that SD displaying any telemetry data. If you have profiles can you share? Also feel free to give some tips and tricks for programming it.
I made my own, and used vJoy. With vJoy you can make up to 128 virtual Gamecontroller buttons and can assign these buttons in Stream Deck and RRRE. It works really great. https://github.com/njz3/vJoy/releases/download/v2.2.1.1/vJoySetup-2.2.1-signed.exe https://github.com/ashupp/Streamdeck-vJoy