I would by a fixture that is long, rather than round, and center it in the space. It's odd that the sink isn't centered...and a long fixture will trick the eye.

If you only just noticed, is it even an issue?

Have an electrician move the junction box, then have a painter patch/paint the spot where the hole used to be.

Thanks all, we just moved in and when I took down the old curtains I noticed it. Honestly didn’t look that closely. Would prefer a solution that doesn’t require hiring anyone at this point (have other priority items to do that we need to hire for).

Sorry couldn’t delete some of pics

It looks like it's centered between the cabinets (excluding the halfmoon shelves).

It doesn't bother me for some reason, probably because there's no symmetry in the space so it's not "off". A single blob pendant probably wouldn't work though.

agree with Fori

look into adjustable arm and swirl arm lights. I think they’d trick the eye if you can find a style you like.