The image here shows the "On Station" satellite with its chassis parallel to the surface of the Earth, visible because it is scattering light.
However to get a flare or glint, the light has to reflect off a surface (not simply scatter). Something I did not immediately recognize is that this...
Russian astronaut Ivan Vagner aboard the ISS took a time lapse video from a nice Aurora Borealis. At 0:05 there are a couple of bright objects seemingly flying above the horizon. First thing that comes to mind are Starlink Satellites.
Source...