Tables contained in services in the Geocortex,

Tables contained in services in the Geocortex,

I noticed that the Geocortex gives numbers for the services and also for the layers\tables inside them but I’m wondering why tables don’t appear in the “Geocortex Essentials REST API” while they do in the ArcGIS Server “Services Directory”

/customer/servlet/servlet.FileDownload?file=00P6000000em1ezEAA

Thank you

Best

Jamal