A survey that has a visibility level of Clinical Staff only or higher does not get sent to the Patient Portal. A message in the Unread Portal tab will alert the staff that the survey failed to deliver.
If appropriate to do so, navigate to the Survey and update the Visibility Level to Any Staff Member: Clinical tab > More button (Customize group) > Surveys.
OP sets all defaults to share all information. Any individual decisions by Practice-users to restrict information sharing (access, use, or exchange) are the responsibility of the Practice in the implementation of its 21st Century Cures Act Information Blocking policies and procedures for its Practice and patients.