Too little space between wall and bed to add anything of any depth/thickness. It's the wrong wall for being an accent wall but you might consider adding a mural.

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If your headboard were between the windows and your tv on that wall across from the windows, then it appears you'd have plenty of room on both sides to place furnishings against the walls.

Consider moving the bed on that wall instead, it's the largest and will make the space better balanced. Is that a wall fireplace? I would move the chairs as well, as set they don't work.

You could always create a small gallery wall? I found Inkifi do a good selection of frame sizes https://inkifi.com/us/wall-art.html

On your bedside left wall you can hang decorative wall watch, art, decorative mirror,corner shelf or wall mirror. A wide range of empty space allows you to choose many things. You can also add glass table in your room in front of sofas..

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