Regarding ITC of FY 2020-21

Hello Everyone, as per latest notification of GST Dept we cannot claim ITC after due date of September 2021 due date for GSTR3B. My query regarding this is, If I filed my GSTR 1 after 11 and before 20 for monthly filer Can Buyer Claim the same ITC, (E.g If I updated March 2021 Bill in Sep GSTR 1 on 19th Sep 2021, then can hw claim the same ITC).