I created a group in Exchange Online (Microsoft 365 group type) and added a few test members. The target is to have a shared calendar. "Subscribe new members" checkmark is enabled. All test users can regularly see the new group calendar in their Outlook, under "All group calendars" but when I add new events to the group calendar on my Outlook, other users don't see anything.
I'm aware that I could even create a new group directly in Outlook and invite other members. In this manner everything works fine.
At the same time I don't understand why the first method does not work as desired. What is the sense of making the calendar available to all users if it is not replicated?