I am trying to get a single appointment by listing the appointments and filtering by selfServiceAppointmentId. But when I make the request using $filter it doesn't seem to work because it returns all the appointments and its not doing the filtering.
https://graph.microsoft.com/v1.0/solutions/bookingBusinesses/test@example.com/appointments?$filter=selfServiceAppointmentId eq '1234-56578-4234'

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