Coastal Habitat Conservation Act of 2021 This bill provides statutory authority for the Coastal Program of the U.S. Fish and Wildlife Service. Among other things, the program identifies the most important natural resource problems and solutions in priority coastal ecosystems in partnership with federal, state, local, and tribal governments, nongovernmental institutions, nonprofit organizations, private individuals, and corporations; and assists in the development and implementation of monitoring protocols to ensure the success of coastal ecosystem restoration and enhancement measures.