Welcome to the community, thank you for your question!
To pair the remote control with the soundbar without using the Bose Music app:
Unplug your router to disconnect the soundbar from the Internet
On the remote control, simultaneously press and hold the Volume down and Left navigation buttons for five seconds to clear pairing memory of the remote. The Power, Source Power and TV Input icons at the top of the remote will blink three times
On the soundbar, press and hold the Action ○ button for five seconds. The light bar will glow continuously while the button is being pressed
When the soundbar is disconnected from the Internet, the Action button will not attempt to access a voice assistant
On the remote control, press the Center navigation button once. Within a few seconds, the six source icons on the remote will blink three times to indicate it has paired with the soundbar
Plug in your router. It may take a couple minutes for the router to restart and reconnect all devices to the Internet
I hope this helps, please let us know if you have any other questions.