Processing times got updated:
https://travel.state.gov/content/travel/en/us-visas/study/exchange/waiver-of-the-exchange-visitor/how-to-apply-waiver.html
3/2/2022 - Submitted waiver to USCIS
9/29/2022 - RFE Request from USCIS
12/22/2022 - RFE Submitted to USCIS
1/25/2023 - USCIS sent to DOS
2/2/2023 - DOS Receives I-612