OnePlus Nord has been reportedly spotted on the TUV Rheinland site with the model number AC2003. In this listing, the phone is listed to feature 5V/6A charging speed that translates to 30W fast charging support.

source https://gadgets.ndtv.com/mobiles/news/oneplus-z-nord-price-carl-pei-tuv-rheinland-site-30w-charging-tipped-launch-tease-2250110#rss-gadgets-all