Nearly every robot enemy you encounter throughout this DLC will have robot components – or “mods” – on them. As such, be sure to loot every fallen robot after you’ve killed them. When collected, these mods will appear under the “Mods” sub-section of the “Inventory” tab of the Pip-Boy.
You should have no issue unlocking this achievement naturally over the course of the DLC so long as you actively loot robot hostiles.