Public Engagement at FERC Act This bill revises and expands the Office of Public Participation in the Federal Energy Regulatory Commission (FERC) and renames it as the Office of Public Participation and Consumer Advocacy. The office may participate in FERC proceedings on rates, service, and infrastructure siting to represent the interests of the public and issue guidance for potential improvements to industry and FERC practices. Additionally, the office must establish a Public and Consumer Advocacy Advisory Committee to review rates, services, and disputes and make recommendations to the office.