  We present general results on generating $\text{AdS}_2$ solutions to Type II
supergravity from $\text{AdS}_3$ solutions via U(1) and SL(2) T-dualities. We
focus on a class of Type IIB solutions with small $\mathcal{N}=4$
supersymmetry, that we show can be embedded into a more general class of
solutions obtained by double analytical continuation from $\text{AdS}_3$
geometries with small $\mathcal{N}=(0,4)$ supersymmetry constructed in the
literature. We then start the analysis of the superconformal quantum mechanics
dual to the $\mathcal{N}=4$ backgrounds focusing on a subclass of
$\text{AdS}_2\times\text{S}^3\times\mathbb{T}^3$ solutions foliated over a
Riemann surface. We show that the associated supersymmetric quantum mechanics
describes monopole bubbling in 4d $\mathcal{N}=2$ supersymmetric gauge theories
living in D3-D7 branes, as previously discussed in the literature. Therefore,
we propose that our solutions provide a geometrical description via holography
of monopole bubbling in 4d $\mathcal{N}=2$ SCFTs. We check our proposal with
the computation of the central charge.
