The game is for sale at my stand of the Essen game fair! My stand number is: 5-E122.
The game will be available in retail after it has been produced. I estimate this to be sometime in October-November 2021.
Here some links to pre-order:
You can also contact your favorite retailer and ask them stock it.
You can also play Galactic Era using the program “Tabletop Simulator“, click on the image here: