By default, all course sites are in an unpublished state. The course site and its contents must be published in order to be visible to students and figure into the gradebook. Watch the video and read the guide below to learn more.
https://player.vimeo.com/video/442139766
For review, to publish your course site and contents you need to:
Delayed availability: If you would like to show a published item to a student at a later date, you can set a configure availability dates in Canvas.