  Disorder-free localization is a recently discovered phenomenon of
nonergodicity that can emerge in quantum many-body systems hosting gauge
symmetries when the initial state is prepared in a superposition of gauge
superselection sectors. Thermalization is then prevented up to all accessible
evolution times despite the model being nonintegrable and
translation-invariant. In a recent work [Halimeh, Zhao, Hauke, and Knolle,
arXiv:2111.02427], it has been shown that terms linear in the gauge-symmetry
generator stabilize disorder-free localization in $\mathrm{U}(1)$ gauge
theories against gauge errors that couple different superselection sectors.
Here, we show in the case of $\mathbb{Z}_2$ gauge theories that disorder-free
localization can not only be stabilized, but also \textit{enhanced} by the
addition of translation-invariant terms linear in a local $\mathbb{Z}_2$
\textit{pseudogenerator} that acts identically to the full generator in a
single superselection sector, but not necessarily outside of it. We show
analytically and numerically how this leads through the quantum Zeno effect to
the dynamical emergence of a renormalized gauge theory with an enhanced local
symmetry, which contains the $\mathbb{Z}_2$ gauge symmetry of the ideal model,
associated with the $\mathbb{Z}_2$ pseudogenerator. The resulting proliferation
of superselection sectors due to this dynamically emergent gauge theory creates
an effective disorder greater than that in the original model, thereby
enhancing disorder-free localization. We demonstrate the experimental
feasibility of the $\mathbb{Z}_2$ pseudogenerator by providing a detailed
readily implementable experimental proposal for the observation of
disorder-free localization in a Rydberg setup.
