When a project invoice is transferred or created in Receivables, the project sends only the invoice header and invoice line description to Receivables, not the invoice distributions. The invoice distributions contain the detailed information such as quantity, unit price, and line total. Therefore, the Receivables invoice does not show these details, but only shows a quantity of 1 and a unit price equal to the line total. https://docs.oracle.com/en/cloud/saas/project-portfolio-management/20c/oapfm/manage-project-invoices.html#OAPFM2355931

Reference https://docs.oracle.com/cloud/latest/projectcs_gs/FAPFM/FAPFM1225328.htm

Ref: https://docs.oracle.com/en/cloud/saas/project-portfolio-management/19a/oapex/define-project-management-configuration.html#OAPEX1357147 Topic - Microsoft Project Prevalidation: Explained The following table describes Prevalidation rules for tasks and resource assignments.
Level
Rule
Lowest-level tasks
One labor and multiple expense resources are allowed for a lowest-level task. Remove other resources.
Summary tasks
Only one labor resource with zero allocation is allowed for a summary task. Remove all other resources.
Milestone tasks
No subtasks are allowed under milestone tasks. Milestones must be lowest-level tasks.
Milestone tasks
Milestone tasks must have zero duration.
Milestone tasks
Only one labor resource, with zero effort, is allowed for a milestone task. Remove all other resources.
When exporting milestone tasks, ensure that the tasks:
Are lowest-levels task with zero duration, that is, the same start and finish dates.
Have only one labor resource assignment with zero effort.
Have percent work complete values of 0 or 100 percent. Any other values are set to zero before export.

Ref: https://docs.oracle.com/en/cloud/saas/project-portfolio-management/19b/oapjs/update-project-performance-data-and-generate-kpis.html#OAPJS16654 Performance Status Indicator Performance status indicators give an immediate picture of the status of a project, such as critical, at risk, and on track. Each distinct icon indicates the status and severity of performance. During KPI definition, you first associate status indicators with performance statuses:
Critical
Severe
At risk
On track
Ahead
You then associate these statuses with threshold levels. When KPI values are generated for a project, each value is compared to the defined thresholds and the corresponding status indicator for the KPI appears on project performance reports.
A status can identify negative performance so that you can take the appropriate actions to prevent or quickly resolve problems. Conversely, a status can identify positive performance to help you track expected or excellent performance.
https://docs.oracle.com/en/cloud/saas/project-portfolio-management/19b/fapfm/implementing-project-financial-management-applications.html#FAPFM975706 Create Key Performance Indicators Create key performance indicators (KPI) to measure how well your organization performs an operational, tactical, or strategic activity that is critical for the current and future success of the organization.
Note: To create KPIs you must enable a project unit to track key performance indicators.
Use the Threshold Levels section to specify thresholds to indicate the health status of a KPI. Select one of the following options:
Multiple threshold levels
Single threshold level value
Single threshold level range

Ref: https://docs.oracle.com/en/cloud/saas/applications-common/19b/facia/define-approval-management.html#FACIA3124477 Topic Approval Groups Each approval group includes a set of users that you configure to act on tasks in a certain pattern. Tasks can be defined to get routed to an approval group instead of an individual user. You can nest approval groups within approval groups.
You have two options for defining the group:
Static: Select the specific users to include in the group.
Dynamic: Provide the logic to use to determine the users in the group.