Currently, the Webex desktop app calendar will only show upcoming meetings in the next 31 days. Any dates after that will be simply not clickable or will not show up at all.
The current workaround is to use the Webex site, where you can choose on your calendar any future point in time to view or edit upcoming meetings.
The same option is available in the old Cisco Webex Meetings desktop app.
I'd like to suggest allowing the Webex app (formerly known as Teams) to also have this option - to be able to view and edit upcoming meetings that will take place at any future time.