No catalog items are visible after an outage/downtime of VMware Identity Manager (vIDM)
VMware Aria Automation 8.x
Aria Automation does run a regular job to sync catalog items, if VMware Identity Manager has been unavailable during this time then this could lead to all catalogue items to be removed from Service Broker.
Within Service Broker please navigate to Content & Policies > Content Sources open each Content Source to then press SAVE & IMPORT.