Combating BDS Act of 2021 This bill allows a state or local government to adopt measures to divest its assets from entities using boycotts, divestments, or sanctions to influence Israel's policies. Such measures shall meet various requirements, including those related to written notice and comment. It also bars lawsuits against investment companies based solely on a company's decision to divest from entities that use boycotts, divestments, or sanctions to influence Israel's policies.