Yes, just toggle Connect multiple calendars on and connect multiple calendars (Pro and above).

You can select multiple calendars to check availability on and multiple calendars to make bookings on. These calendars do not need to be the same.

Add multiple calendars to an appointment question

If you want to make sure the appointment is available on all calendars or one or more calendars, you can set that if you have at least two calendars connected and set to check availability on.

Check availability on multiple connected calendars