SYZ Mirrors in non-Abelian 3d Mirror Symmetry

In the SYZ program, the mirror of $Y$ is the moduli space of Lagrangian branes in $Y$. When $Y$ is equipped with a Hamiltonian $G$-action, we prove that its mirror determines a canonical complex Lagrangian subvariety in the Coulomb branch of the 3d $\mathcal{N}=4$ pure $G$-gauge theory.