How to use Roku Streambar as Bluetooth speaker for PC Windows 10
For windows 10 from Settings --> Bluetooth and other devices --> more Bluetooth options--> under options toggle allow Bluetooth devices to find this pc you can connect with this but might not still get audio so next step go to Sound --> Manage sound devices Then under output Devices activate Tv Tuner Audio( Roku stream bar audio).
I hope this resolve this issue for you.