It could be settling and that’s a DIY sand, fill with spackling/mud, sand again, and paint job that just about anyone can accomplish. You can find drywall patch videos on YouTube and it’d be more or less just like fixing a patch seam.
I’d say under $50 for all materials and you’d most likely struggle to find anyone to do a small job like that at the moment. One thing you may want to finish reach out to the builder and request they fix it if the house is less than a year old. May or may not get you somewhere.