During the upgrade plan generation step after selecting VMware Aria Operations and the target version 8.18.5 fails with error:
Failed to generate upgrade plan. There is no releases available for VMware Aria Operations for Logs 8.18.3
VMware Aria Suite Lifecycle 8.18.3
The issue was resolved by upgrading Aria Operations to 8.18.5 manually as per Install a Software Update
After the upgrade was complete, an inventory sync was performed as per Inventory synchronization in VMware Aria Suite Lifecycle