Streamlining Permitting to Enable Efficient Deployment of Broadband Infrastructure Act of 2021 This bill exempts certain broadband infrastructure project actions from specified environmental and historic preservation review requirements. Specifically, the bill exempts (1) new communications facilities within specified dimensions in public rights-of-way, (2) replacement facilities that are of a similar type, (3) certain small antennas, (4) facility expansions within specified limits, and (5) new easements for facilities on federal property for which easements were previously granted for other facilities.