I had FFS 3 months ago, no visible scars anywhere.
Surgeons warned me about scars at the nose - the decision whether to do a relatively simple rhinosplasty (nose job) or add a lip lift to that. Depending on method, a minimal rhino involves a tiny incision between two nostrils, not very visible even if there's a scar. A lip lift involves an incision all the way across the lower edge of nose. (I've heard a few surgeons do a lip lift further down, I wouldn't want that). My surgeons hid the lip-lift incision mostly inside the nose but there was still a risk. If you have a tendency to scar a lip lift might not be worth it.
For forehead bone work I had the coronal incision (hidden further back where a hair band would go), very happy with that. Each method has advantages and disadvantages. A hairline incision is more common, many people come out just fine but that has higher risk of a visible scar.