Yes, this interface is very limited, you should have much more options there.
I can only guess that you have developed some custom settings that prevent you from seeing everything, or that your upgrade last time did not go well, thus the best solution would be to reinstall.
Of course, please do not do it on production right away
I think you can ask in the Installation Problems forum.
(This does not seem to be related to the gradebook)
Gradebook
Grades not Visible to Students
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