Gmail recognizes events but gives no option to add them to Calendar

When I receive an appointment email with a date and time, Gmail generates a header like the following:

The appointment information is detected by Gmail but there is no way to turn that information into an appointment. If I click on the hamburger kebab button, I see Create event but that only produces an event with a default datetime and location. Some online tutorials say to open the Calendar sidebar and Create an event will appear at the bottom. I do not see that option in my Calendar sidebar.

How can I get Gmail to create an event from information it clearly recognizes?