If it has no function, it surely would be a nice button for your garage opener. Easy to add that under the panel - I did that on my old ST1300, which had a similar button on the handlebar cluster - PO used it for his communication setup
It's 2022, why bother with various garage door openers and red buttons (that are not waterproof anyway), just use the MyQ App on your smartphone, just a touch of the screen to open or close. (plus you can open and close your garage door from anywhere in the world, I.e. for Amazon delivery, and it will notify you if you leave the door open when you go to work...and then when you get to work pull out your phone and close your garage door at home...how cool is that...if you have cameras you can watch the garage door close in real time)
2) Or setup your MyQ to automatically open and close the door, When you leave or arrive home, an intelligent geofence recognizes your vehicle's location and automatically opens or closes your garage door.
3) Or You can use MyQ with Google Assistant. You can connect MyQ to Google Assistant and close the garage door or check the status of it! Simply say, 'OK Google, ask MyQ to close the garage door,' and it will!
Yup - and I don't want every device in my house attached to the internet, and I don't want my phone to be in control of my life. If I want to open the garage door, I stand near it and push a button. If I want to change the temperature in the house, I walk over to the thermostat and change it.