It would be great if there is a monitoring tool or a report which shows apps opened/used by the participants during the meeting.
Could you please describe why this is being requested?
Based on OS level sandboxing, it is typically not possible an app published by Cisco Systems to access other apps not published by Cisco Systems. This is by design to mitigate potential privacy and secure information.
Perhaps there is something we can do but we need to know more deeply what the customer is trying to accomplish.