Pedestrian mobility remains neglected in MaaS solutions, yet it has the potential to become a tool for promoting public policies and more sustainable lifestyles away from excessive private car use. This research identifies the potential for sustainable value creation and the transversal implications for policymakers and other MaaS stakeholders of overlooking walking in innovations like MaaS. To do so, we explore how walking is currently integrated into four MaaS solutions in the Paris region. Our main findings show heterogeneity in the hierarchy given to walking in the user interfaces and the determinant roles of governance and policy in supporting the prioritization of pedestrian mobility in MaaS.