how to see the origin of an absence request (absence or time module)

Example: our customer has requirements that allow them to enter an absence via time card OR via add absence, so we have a mixture of how employees are submitting absences.

Because of 23B enhancements that integrate time and absence module data together, we don't know where the absence was ORIGINALLY entered.

We are interested in understanding how many employees enter absences on the time card vs how many are using Add absence. Is there a table that shows the point of origin for an absence request?

Related: When deploying the system, the customer opted out of all time module notifications. The reason was to avoid manager fatigue from employees submitting their time cards throughout the time period. But I'm interested in learning if there is a notification available in the time module that would inform the manager when an employee enters an