Here is how to instantly view ICS files
Navigate to Calendar Tools:
Select your property and channel for the ical you wish to view more details on:
Copy the iCal link:
Paste the link into your browser. It will save it as an ICS file
Using a product such as - https://openicsfile.com/csv-convert.html- drag or upload the file into that application.
View the details of the iCal to understand which information is being sent by it: