Yes. In Robles v. Domino's Pizza (2019), the Ninth Circuit held that Domino's mobile ordering app — not just its website — was subject to ADA Title III's accessibility requirements, and the U.S. Supreme Court declined to review that ruling in October 2019. The DOJ's 2024 Title II rule reinforces this for the public sector, explicitly naming mobile applications published by state and local governments as content that must meet WCAG 2.1 Level AA. Whether it's delivered through a browser or a native app, courts and regulators treat it as covered.