When using the Workspaces List Reservations API :
https://marketplace.zoom.us/docs/api-reference/zoom-api/methods/#operation/listReservations
The API does not return the reservations reserved using the Zoom Room iPad, but only returns the ones reserved using the Zoom Portal.
The reservations done via Zoom Room iPad are labeled as ‘unknown user’ on the Zoom Portal.
Regards,
Swapnil