Hey David, welcome to the Prismic community forum!
There isn’t yet a built-in functionality to have this kind of relationship between links / sections inside documents. But there are workarounds for this!
If the sections you want to scroll to are slices, you can add an additional Key Text field to each slice. This field will hold the string that you can then add to the href of your anchor tags to be able to correctly redirect to the desired links inside your docs.