I think I would have used a long sofa table a little shorter than the sofa and place a few objects on it with no lighting. I don’t think the back of your sofa is unattractive.

Back of your sofa is fine. That table is too short. Get a properly sized console table for that spot or just move the short table, which I like, just not there.

the table is too short, looks silly

The light and mirrors draw attention to the area you are trying to minimize - adding more items will multiply the effect. Instead, I'd try to find a narrow sofa table that is a bit taller (about 6" lower than the sofa back) and longer (almost the length of the sofa back). No bottom shelf. Add a couple of statement succulents to the top.

I agree with sabrina. Scale is wrong, too low.

From C&B 84" long

That weird light strip makes it look like there should be an aquarium there.