best response confirmed by Larsius (Senior Member)
Solution
Hello, you can only schedule a channel meeting using Teams, it's not currently possible with Outlook. The Channel Calendar App is only part of the current channel being a filtered view of the group mailbox. Meaning it will show all the meeting in that particular channel in a calendar view. You can add a channel calendar to all your channels.
We support Ukraine and condemn war. Push Russian government to act against war. Be brave, vocal and show your support to Ukraine. Follow the latest news HERE