Upon reaching 18th level, the Echo Knight fighter gains the Legion of One feature, whose description says in part (EGtW, p. 184):
You can use a bonus action to create two echoes with your Manifest Echo feature, and these echoes can coexist. If you try to create a third echo, the previous two echoes are destroyed. Anything you can do from one echo's position can be done from the other's instead.
Can you move both echoes 30 feet each on the same turn? Or is it just a shared 30 feet of movement between the two?