I’m quite new to this fandom so I’m not sure if this has been touched on before, but is it ever explained how the Doctor, who was found from a wormhole, has the same physiology as Gallifreyans (two hearts)? Among the numerous plot holes the Timeless Child creates, this one sticks out as the biggest. Did they establish when Tecteun stole regeneration for the TimeLords that she also gave everyone two hearts?