Does the Legion of One Echo Knight ability allow each echo to use Unleash Incarnation?

Unleash Incarnation (EGtW, p. 183)States:

“Whenever you take the Attack action, you can make one additional melee attack from the echo’s position. You can use this feature a number of times equal to your Constitution modifier”

Legion of One (EGtW, p. 184) States:

“You can use a bonus action to create two echoes with your Manifest Echo feature”

If you have created 2 echoes, can each of them be given an extra attack per attack action? Or does only one of them gain that ability? (assuming you have enough of a constitution bonus to match the number of attacks needed.)