Look to U.S. Department of Education Office of Special Education Program’s annual “determinations” for answers.
Every year, states and “entities” are required to evaluate their implementation of IDEA and submit their State Performance Plan and Annual Performance Report (SPP/APR) to USDOE, which subsequently releases determination letters based on SPP/APR in response. There’s a two year lag, so the 2023 determination letters, as an example, reflect the 2021 SPPs/APRs submitted by the states and entities, and provide the determination and basis for determination based on the 2021 period.