storage – Where does Huawei store "readjusted documents"

The Camera application of my P20lite has a "Document" mode, in which document photos can be rectified / straightened / aligned. In the Gallery application, they are then stored in a separate album of "Camera" (which I synchronize to my PC via Syncthing), called "Readjusted Documents". But where is it physically? I would also like to synchronize these documents.