The USCIS Office of Policy & Strategy published a report in July 2021, comparing the numbers of monthly Form I-526 filings before and after EB-5 regulations went into effect in November 2019.
Read the full report here: https://iiusa.org/wp-content/uploads/2021/08/IIUSA-Analysis-Impact-of-the-Lapse-on-Investors-Inestment-and-Jobs-8.27.pdf