The Calendar add-on can be used to show your calendar on the right-hand side of the screen in Gmail. This is useful to see any events coming up in your calendar and can also be used to schedule new events.
Click on the Calendar button at the top of the add-ons pane in Gmail
Click on the drop-down arrow to choose to show Day view or a Schedule of all upcoming appointments
View the details of any appointment by clicking on the appointment - you will be able to join any Meet calls from here
Add a new appointment by clicking on the time of the appointment. You can add a title, guests, rooms, Google Meet video conferencing, etc. from the add-on pane.