With Fellow's calendar integration, links will be added to calendar once someone has added to the notes.
In your calendar event, the link will appear like this:
You can edit this by going to User Settings --> Notifications, and scrolling to the very bottom.
If the links are not being added as expected, this is the first place to check
If you have the setting turned on, and the links are still not appearing - it might be because the first person to add to the meeting notes has this setting turned off.
Whether or not the links are added, matches the preferences of the person who first adds content to the meeting notes. So if the first person has it set to not add links to the calendar event, then no link will be added.