Before replacing your curtains as this can be quite expensive for such a large window, if they are in good condition, add a band of extra fabric to the bottom in what ever suits you, your existing curtain track can then be moved up to the ceiling for good looking full length curtains without the large round eyelets, could save you a lot of money, I would look at replacing/removing the sheers cheers

Personally if I were to put a runner down the area I'd keep it either plain or a very soft muted colour palate maybe with the grey and natural colours as right now it looks quite classy so you don't want to make it to bold or in your face just soft and calming for the area to enhance it all as one look. I don't really think you need one at all as I love the softness of the area as a whole as it is, sometimes less is more but it once again comes down to personal taste.

Hi Z Cee A lovely headboard choice!! As mentioned in comments above, the headboard is the star of the show in this room but the choice of bedsides need to compliment it. I would look for something that echos the headboard with some texture, or patina but nothing too dark or heavy. Something in antique brass would look great and give a lift against the timber. Sidetables and stools make good options for bedsides if you dont need the storage. A couple of ideas below. Best wishes

I think that top one from Amart will look lovely with the room and will definitely carry on with your timber throughout, it’s different, has a light wood that will pick up the white of the tables, I would love it myself. Are you able to get a larger photo of it and see how it looks near tables.