Peter wasn't referring to whether you could use one button; he meant that the menu item check needs to be triggered by something.
Set your macro to use the USB Device Key Trigger and press your Stream Deck button. That's it.
You should check out the differences between KM Link and the Native KM SD plugin here:
Post your currrent macro with a description of its purpose and I'll see if I can get you up and running with a OneButtonToRuleThemAll solution.