Your usage of the nonstandard term “non-faculty staff”, along with certain other assumptions that seem to be implicit in your question, suggest that you have some misguided notions about what various groups of people employed at a university do. To take your example of librarians, they are part of what is generally referred to as “staff”. They do an important job and can be highly educated and skilled, but they generally do not engage in academic research or teaching as far as I’m aware, and thus the concept of academic freedom does not apply to them. Note that this is a different statement than saying that they do not enjoy academic freedom; rather, the question of whether they enjoy it or not doesn’t even make sense. The same would be true for other groups of staff members who play a supporting role in the life of a university but do not teach or do research.
I should add that none of what I write above should be regarded as in any way disrespectful towards librarians or any other group of university staff. In fact, as a professor in STEM, and more specifically pure math (which seems to be as uncontroversial and apolitical as a research area can get), I also feel that the question of academic freedom is essentially irrelevant for me, and almost as meaningless for me as it is for librarians. Although in a technical sense I can be said to “enjoy academic freedom”, and although it may be fun to fantasize about one day going in to teach my calculus class and spending the lecture time discussing controversial political topics instead of math, knowing that if anybody gets upset I can invoke my supposedly sacred academic freedom, in practice this so-called freedom is a purely theoretical notion; it has never come up in any practical context, and almost certainly never will.