Exported Excel Sheet Data in School Data Sync Insights in Teams - Education Insights Premium

According to the documentation on the Microsoft Learn website https://learn.microsoft.com/en-us/schooldatasync/insights-in-teams-csv-export-format  , the exported CSV file includes various columns representing different categories of data. However, when we exported the data for our organization or specific school, we noticed that the "OneNote Activity" and "Assessments Activity" columns are displaying no data. 

Furthermore, we would like to clarify the specific meaning of the data in the "Time spent in meeting" column. Does this column represent the duration of online meetings created on the Class Teams platform or the duration of calls between the students?

We would greatly appreciate it if you could provide us with more information regarding the expected data in the exported Excel Sheet for the whole organization or specific school. Additionally, any clarification on the interpretation of the "Time spent in meeting" column would be extremely helpful.