A Transient service instance is created every time a calling method or dependent class requests for it from the container, whereas a Scoped service instance is created for a request and is reused by the container for all calling methods or classes within that request.
Hence a Scoped service has a create-once-per-request scope while the Transient has a create-once-per-service-invoke scope.
What is the difference between a Transient and Scoped service?
Scoped service has a create-once-per-request scope while the Transient has a create-once-per-service-invoke scope.