Navy Frigate (FFG[X]) Program: Background and Issues for Congress [Updated June 26, 2020] [open pdf - 3MB]
From the Introduction: "This report provides background information and discusses potential issues for Congress regarding the Navy's FFG(X) program, a program to procure a new class of 20 guided-missile frigates (FFGs). The Navy's proposed FY2021 budget requests $1,053.1 million (i.e., about $1.1 billion) for the procurement of the second FFG(X)."
CRS Report for Congress, R44972
Congressional Research Service: https://crsreports.congress.gov/