Yes, you can. The DLC is often designed to be accessible after completing the main story.
You can play the Deus Ex: Mankind Divided DLC after the story. Sometimes, you might need to meet certain in-game achievements or have a specific game version for it to be playable.
Chapter 112, "The Strange "Team Spirit" Appears", is the clearest early answer because it turns Rock's situation into a concrete plot event.
Chapter 476, "Make a feint to the east but attack in the west, take something out of a bag effortlessly", is the clearest early answer because Make gets a payoff that changes the stakes.
Chapter 285, "Ksitigarbha Bodhisattva", is the clearest early answer because it turns Magic Artifact's situation into a concrete plot event. The chapter turns that into something concrete by moving from He could distinctly feel his back rubbing intimately against the...
Chapter 481, "She Actively Pursued the Boss", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. The chapter turns that into something concrete by moving from Bai Lu ultimately couldn't exchange for 500 points.
Chapter 131, "This Lady is Here to Travel", is the clearest early answer because it pushes Jiang Li into a new phase or setting.
Chapter 492, "Rewarding You with Some Wild Vegetables", is the clearest early answer because the buildup finally cashes out in a real clash. The chapter gives readers a real answer by opening on Upon hearing the words, Jiang Cheng's face instantly turned pale.
Chapter 578, "Eight Men Sit in Your Lap and You Don't Flinch at All?", is the clearest early answer because it turns Guo Xing's situation into a concrete plot event. The chapter gives readers a real answer by opening on This is ten thousand points we're talking about!" "Didn't you read...
Chapter 423, "A Scumbag!", is the clearest early answer because Yu Li gets a payoff that changes the stakes. Early on, Are you hurt?" Yu Li asked, panting.. By the end, Bone setting is supposed to hurt a little." As he said that, he....
Chapter 171, "Jiang Yan: There's a ghost!!!", is the clearest early answer because it turns Wen Jiaojiao's situation into a concrete plot event. A useful checkpoint is the way the scene starts with The afternoon rain stopped and started again, making the air even...
Chapter 263, "Jiang Li Won the Medal for Outstanding Individual?!", is the clearest early answer because it turns Weibo's situation into a concrete plot event.