Seems ambiguous, but I’d lean towards no? Split wing is defined as having zero feathers in that area, even growing feathers. When a bird has lost the feather there, and is regrowing it, it looks a lot like split wing. I’ve mislabeled a few birds of my own as split-winged, only for them to later regrow that feather, and I realize they didn’t have split wing. There does appear to be a small feather growing in the gap, so I’d guess it’s not split wing.