https://www.techradar.com/news/samsung-galaxy-note-10-might-have-redesigned-cameras

One of the main design changes on the Samsung Galaxy Note 10 could be the cameras, with the latest leak suggesting that the rear snappers will move from a horizontal to a vertical arrangement.

That claim is based on images found on Weibo (a Chinese social network) and shared by @UniverseIce (a reputable leaker), showing a sketch of a horizontal triple-lens camera block, and another of the camera positioned on the rear of a phone.