Hi and welcome to Knitting Help.
Gorgeous scarf! Antares is right, there usually is more than one way to do these things. It might be an elongated stitch on a scarf that is knit sideways from what I can see. It's fun to do and looks very pretty when finished.
The other possiblity is that it's a dropped stitch and ladder over several stitches. That makes sense of the direction of the Vs on the close up of the scarf.