The European Commission has designated five Notified Bodies: BSI UK, TÜV Süd, DEKRADE, IMQ Italy and TÜV Rheinland. The Commission expects to appoint a first IVDR Notified Body by the end of this year and to appoint between 12 and 15 Notified Bodies in total by the end of the year.
You can find further information at: https://ec.europa.eu/growth/tools-databases/nando/