  We investigate symmetries on unital Kirchberg algebras with respect to the
Rokhlin property and finite Rokhlin dimension. In stark contrast to the
restrictiveness of the Rokhlin property, every such outer action has Rokhlin
dimension at most 1. A consequence of these observations is a relationship
between the nuclear dimension of an $\mathcal{O}_\infty$-absorbing C*-algebra
and its $\mathcal{O}_2$-stabilization. A more direct and alternative approach
to this is given as well. Several applications of this relationship are
discussed to cover a fairly large class of $\mathcal{O}_\infty$-absorbing
C*-algebras that turn out to have finite nuclear dimension.
