  Symmetry Theories (SymThs) provide a flexible framework for analyzing the
global categorical symmetries of a $D$-dimensional QFT$_{D}$ in terms of a
$(D+1)$-dimensional bulk system SymTh$_{D+1}$. In QFTs realized via local
string backgrounds, these SymThs naturally arise from dimensional reduction of
the linking boundary geometry. To track possible time dependent effects we
introduce a celestial generalization of the standard "boundary at infinity" of
a SymTh. As an application of these considerations we revisit large $N$ quiver
gauge theories realized by spacetime filling D3-branes probing a
non-supersymmetric orbifold $\mathbb{R}^6 / \Gamma$. Comparing the imprint of
symmetry breaking on the celestial geometry at small and large 't Hooft
coupling we find evidence for an intermediate symmetry preserving conformal
fixed point.
