No, you can't.At the end of your turn, all of these cards' [End of Your Turn] effects will trigger at the same time, but after you choose the activation order, declare the attack for the 1st Digimon, and effects such as [When Attacking] effects and ""when one of your Digimon attacks"" effects have finished activating, then the timing will occur for the activation of the [End of Your Turn] effects on the 2nd and other copies of this card that were pending activation. However, since the 1st Digimon is already attacking, you can't declare another attack and the effect activation will fail. As a result, only the copy that activated first will attack.