New Roku onn tv connecting to sound bar issues

So I just bought this new one tv 

65" 4K UHD HDR10 Roku TV

MODEL: 1000 2587|

So I have this LG soundbar and wireless speaker kit model SCN4R  it's connected via the optical cable so I turn the TV up with my remote and the volume on the soundbar goes down. So Im having to use the sound bars remote for volume control. Is there a way to add Bluetooth to this television? The soundbar worked great on the 3 year old Samsung until components started failing and no warranty coverage.