XP is awarded for completing encounters, not just fights
As a DM in 5E, you have massive freedom to craft your campaign and reward players as you see fit. Even when working from a source book such as Eberron, you can adjust encounters as you see fit to add to the story or present additional challenge.
XP was never designed as only a combat reward, but rather, a reward for your PCs overcoming an obstacle to their adventure goal. This can be outright defeat of an enemy in combat, roleplay encounters, puzzle-solving, political machinations; anything your players come up with to address a problem. Your role in PC progression is to determine the difficulty of these problems, and to reward the PCs with the appropriate degree of "growth" for having overcome them; this growth is represented as Experience Points.
In short, the simple answer is: "Award experience however you like!"