Timeless Child's realm

In an account which claimed to have discovered in the Matrix, the Timeless Child, who would become the Time Lord known as the Doctor, hailed from a realm which was potentially a separate dimension or universe from N-Space.

The child, the only known member of their species, was found near a boundary to their realm, from which they had come through, seemingly having been dumped on a random planet near a monument. Ultimately, the child was found and taken to Gallifrey by the Shobogan Tecteun, though their true place of origin remained unknown to the Gallifreyan explorer. (TV: The Timeless Children)