Renewable Fuel Infrastructure Investment and Market Expansion Act of 2021 This bill establishes programs and requirements to expand access to renewable fuel. Specifically, the U.S. Department of Agriculture must establish a program to award grants for the deployment of renewable fuel infrastructure as specified by this bill. In addition, the Environmental Protection Agency (EPA) must finalize a 2021 proposed rule titled E 15 Fuel Dispenser Labeling and Compatibility With Underground Storage Tanks . When finalizing the rule, the EPA must eliminate the labeling requirements for fuel pumps that dispense E 15 fuel (i.e., gasoline that contains 15% ethanol).