Also, I’m not feeling very well today, so I’m not 100% sure if this is relevant to your problem or not, but there is a known issue that grays out that field. But I think that may only affect people who do have a hub.
If you do have a hub and are looking for an answer to this problem, Check the following thread and see if it helps any. Apparently you have to have the hub disconnected before it will let you change the settings in the app. Or something like that.
Again, I’m sorry I’m not feeling very well and I have some vision impairment and I have to mostly rely on my memory. Since I don’t have this particular model hub, I haven’t followed things super closely.
But to be honest, this may not apply to the OP in this thread, it’s just the only other time I can remember someone talking about that field being unavailable.
For the OP, I would definitely ask in the Samsung home theater help forum I mentioned, they should have a better answer for you. Again, I mostly just added this one in case someone else finds this thread in the future who does have a hub.
Sorry to be so useless on this, I wish I had a better answer. I did add the sound bar model number to the thread title, so maybe if somebody has that same device they’ll have something more helpful to add.
Again, I don’t think the following thread is going to apply to your situation, but it does discuss the network configuration option being greyed out so maybe it will help someone else in the future.