The tutorial about TileMap is incredibly useful, but it is unclear what the .png file looks like - is it one long image with all of the sprites in a single row, or is it a n x n spritemap with sprites all 32x32, etc? It would be helpful to attach the image file as a link or download in the documentation:
https://www.sfml-dev.org/tutorials/2.4/graphics-vertex-array.phpCheers