What exactly do you see if your dashboard?
If the device was auto discovered it should come up with controls accordingly.
2nd question: what functions exactly are you trying to control? Reason I’m asking is that There is no soundbar listed under Samsung in the supported HA components:
OK, Does the on/off button work?
If you send music to it (Like via Alexa), can you then click on the next track button?
If not, it’ll need a bug reported on github
This is exactly what happens w/ my Samsung TV. I get power state only (which isn’t wholly accurate) sometimes it will disappear from the dashboard and none of the controls work. Its known that the model I have isn’t’ supported with essentially any thing at all but it shows up in network discoveries Good luck. I use an IR blaster w/ my TV.