Regrind Services - Test
You do not have a link list or collection with a handle set to regrind-services-test, or you do and it's empty.
Go ahead and create a link list called Regrind Services - Test on your Navigation page and populate that link list with links that point to collections, to see collections listed here. Make sure the link list also has a handle set to regrind-services-test.
OR if you want this page to be display products, create a collection called Regrind Services - Test.