The "Expanding Appalachia's Broadband Access Act" directs the Comptroller General of the United States to conduct a comprehensive study on the Appalachian Regional Commission's capacity to incorporate low-orbit satellites into its broadband initiatives. This study, mandated within 90 days of the bill's enactment, must be submitted to Congress and include several key components. Specifically, it requires a review of the capacity of low-orbit satellite services for business purposes and an evaluation of economic development growth in regions that have already adopted these satellites for businesses. Furthermore, the Comptroller General will analyze the cost-effectiveness of deploying broadband satellites to foster economic development within the Appalachian region.