In general for Zeiss images, multiple scenes are intended to be split using the Processing tab in Zen - "Split scenes (write files) option. Also, when setting up imaging experiments that generate multiple scenes, you should be able to label the scenes (instead of P1 P2 etc for multiple points), which can be included in the file names of the resulting split using one of the checkboxes. Hopefully the collection of split images can be imported into QuPath.
This can be done either at the microscope or using Zen Lite which is available for free (although "lite" is a bit of a misnomer with version 2.5 being over 6GB to download). You may be able to find a colleague who has already downloaded the installation file.