Each time you confirm an appointment or you send a confirmation, you will receive an email with a .ICS file attached. This file is a standard calendar format that allows you to save the appointment in most common agenda applications.
The appointment list is also available in the “my agenda” page, that you can see after you login in the event B2meet page.
Clicking on “appointment detail” in the “actions” menu you can see the appointment details and its messages. You can also download the .ICS file.