Brianna Lieneck Boating Safety Act of 2023 This bill requires the Coast Guard to study and report to Congress on recreational vessel operator training. The study must include a review of Coast Guard Auxiliary and Power Squadron training programs, existing state boating education programs, and other recreational vessel operator training programs. The report must analyze, among other topics, minimum standards for education of recreational vessel operators; how a federal training and testing program can be harmonized with state programs; how the Coast Guard would administer a federal boating education, training, and testing program; and the extent to which a federal boating education, training, and testing program should be required for all waters of a state.