That looks like a bedroom and the overlooking situation doesn’t seem too bad. Are there specific circumstances you’re trying to address? You can use plants ie straight and narrow Lilly Pillys or Neigbours-be-gone. Or construct a screen, either decorative or wooden, and cover with a vine.
View from my backdoor - need help for privacy and to hide neighbour!
Options for privacy (blocking out a neighbour)
Feedback on floorplan on a sloping block- Need help!
Suggestions for a window treatment for this please...