Yesterday Oneplus Introduced Oneplus Nord 2 and today they already rolled its first OTA update.
So in all likely hood once you receive your Nord 2 after purchasing it on July 28th, this update will already be available for u to download. This update is labeled as OxygenOS 11.3 A.05. It is currently being rolled out in European markets and soon it will hit global markets too.
This first update for Nord 2 is about 285 MB in size, bringing not just improvements to system and camera but also brings stability to wifi and network transfers and fixes auto brightness, fingerprint related issues.