Sorry that you're unable to find your Home Speaker 300 in the Bose Music app.
Are you trying to connect through Bluetooth or connect it to your Wi-Fi? If you haven't set up the speaker through your network on the app yet, you can connect via the Bluetooth settings on your device. If you're looking to set up your speaker to use the Bose Music app, please follow these steps - Setting up your Home Speaker 300. If your speaker is not in setup mode (solid amber light bar), simultaneously touch and hold the AUX and Play/Pause buttons. The light bar will simulate a 5-second countdown by changing size every second It will then blink white twice, then glow amber. Now the app will be able to discover the speaker for setup.
Let me know if you have any problems with this.
Feel more. Do more. Be more. New to the community? Check out the Getting Started board. Help others find answers to your questions by clicking on 'Accept as Solution' at the bottom of a reply. If you see a post you like, make sure to give it a thumbs up!