The base meaning of the scene should be obvious. We follow Blagg, who uses the Force to attract his broom and, after some half-hearted sweeping, stares up at the sky, possibly seeing the Millennium Falcon zipping through hyperspace, before he holds the stick up like a laser sword, imagining his future as a Jedi.
Tomder bursts in and scatters them back to work. This final scene returns us to these kids - called Temri Blagg, Arashell Sar and Oniho Zaya per The Visual Dictionary - reliving the story of Luke's showdown of Crait.
