Yes it's possible.
pigmalien.github.io/cubic
It's just not setup with the "ease of use" as the rest of the engine.
I think the reason for that is that there are far too many ways to implement it to make it where it would have the features everyone would want.
That being said, the expressions you would use are qarp() and cubic().
Along with lerp(), and cosp() those are the included expressions for interpolation.