Yes. Use the Sound-Bar remote and go into the TV settings and pair that remote with the TV or use the remote control app in Smart things and use both from ur phone.
This should be possible if the soundbar was made after 2017. If that's the case, there should be an option for the soundbar to respond to either a Samsung only remote or a remote from another manufacturer. Try toggling through those options and see if the soundbar responds to your TV remote. If both TV & soundbar support Bluetooth, you may have to pair the soundbar to the TV in order for the two to communicate with each other.
