Instagram is part of the Facebook empire and Auscision, like any progressive company, wisely uses all social media avenues to maximise brand exposure. We've known about the N scale NR project for a year+, and the BGKF sample was posted on Facebook not that long ago. The Instagram post offers nothing overly exciting from the unknowns beyond confirmation the NHFF is also being released which was a no-brainer as the BGKF is a NHFF with lid added.
note: posed samples at https://www.instagram.com/p/CLKb7dTHA9p/