First, just to be clear up front, Scrivener 3.0 cannot link text to text, for instance like OneNote can. (I think that’s what you’re looking for. If not, please clarify.)
What it can do is link text to documents (via internal Doc Links) and documents to documents (via Doc Bookmarks).
There are a number of ways to work around this, which may or may not be useful to you, depending on your working methods and how detailed/granular you are willing to structure your binder items.
Here is a thread wherein AmberV of L&L Support discusses these workarounds. Be forewarned, it’s not simple in the reading, although depending on which method you choose, it may end up being simple in the implementation.
Best,
Jim