The European Commission has updated their website, providing slightly more time for the availability of UDI/device registration and NB modules.  See below:

 “The module on UDI/device registration (second module) and the module on Certificates and Notified Bodies (third module) will become available by >> in September 2021. Afterwards, the remaining modules will be displayed as soon as they are functional

🔍 Find more here : https://ec.europa.eu/health/md_eudamed/overview_en  (Half way down  the page)