Modernizing the Accelerated Approval Pathway Act of 2022 This bill modifies provisions relating to the accelerated approval of drugs for serious or life-threatening diseases or conditions, including by requiring the Food and Drug Administration (FDA) to publish its reasons when it determines a postapproval study to be unnecessary. The bill also establishes a pilot program and an FDA council to support the development of drugs for rare diseases and ensure the appropriate use of the accelerated approval pathway, respectively.