Hi akwebb1,
Thank you for reaching Microsoft Community.
Just to confirm that we get the exact picture of the concern: you have your Windows 11 device and Android phone connected to your new Surface Headphones 2+ (through USB Link for the Windows 11 device and Bluetooth for the android phone), audio plays fine on the Windows 11 device but when you try to play audio on the Android phone, no audio output on the phone, correct?
How about if you step far ways from the Windows 11 device until the connection does not reach the headphones then play audio on the android phone, do you get audio output on the Android phone?
The Surface Headphones 2+ supports multiple devices. When 2 devices are connected, the headphones will play audio to whichever device is providing the audio first and the other device will just be on standby. You do not need to manually disconnect the first device first before switching to the other device. However, you need to either turn off Bluetooth first on the first device then play audio on the second device. Try also to open the Surface app on your Android phone then select the headphones and click Connect. Once it shows Connected, start playing audio on the Android phone then and see if this works.
Kind regards,
Marrion