Whatever they are, they must have relations to space and time. So let’s imagine. At every spacetime event with a location and a miniscule slice of time, x, y, z, and t, let’s add six dimensions more.
So we have: x, y, z, t, s1, s2, s3, s4, s5, and s6.
These six dimensions are not time and they are not space. But they react with time and space. At each nanosecond of time, as you sit in a chair at some specific latitude, longitude and altitude, there are six other things. These six “dimensions” make a whole in the same way that with three spatial dimensions you can build a box, but their interactions are not measurable with space or time devices.
Not space. Not time. Something else. They do not extend into space, and they do not happen in time. Yet there are the calculations.
Not spacelike. Not timelike. Beyond space, outside of time. What?