H. Rept. 117-289: Increase Federal Disaster Cost Share Act of 2021, Report to Accompany H.R. 1951, Including Cost Estimate of the Congressional Budget Office, April 6, 2022 [open pdf - 493KB]
From the Purpose and Summary: "The purpose of H.R. 1951, as amended, is to modify the federal cost share of certain assistance provided under the 'Robert T. Stafford Disaster Relief and Emergency Assistance Act' for major disaster declarations from calendar year 2020."
H. Rept. 117-289; House Report 117-289
U.S. Government Publishing Office: http://www.gpo.gov/