@BrianLester you can choose to add the Rubrics link to navigation.
I'm perplexed as to rubrics not showing which suggests that you may be using a release date rather than 'available from'.
Our experienced behaviour (paid version) is that apart from Quizzes, an assignment and its details and rubrics are visible to students before the 'available from' date has elapsed.
If we want students to have the general information but not the specific task/question we add this as a file in a "Timed Release Folder" in Files, where it is set to release at the appropriate point. Hence students can see the conditions and rubric for a timed task in advance, and the task itself at the appointed hour....