  We establish a map between AdS$_3 \times$S$^2$ and AdS$_7$ solutions to
massive IIA supergravity that allows one to interpret the former as holographic
duals to D2-D4 defects inside 6d (1,0) CFTs. This relation singles out in a
particular manner the AdS$_3\times$S$^2$ solution constructed from
AdS$_3\times$S$^3\times $CY$_2$ through non-Abelian T-duality, with respect to
a freely acting SU(2). We find explicit global completions to this solution and
provide well-defined (0,4) 2d dual CFTs associated to them. These completions
consist of linear quivers with colour groups coming from D2 and D6 branes and
flavour groups coming from D8 and D4 branes. Finally, we discuss the relation
with flows interpolating between AdS$_3\times$S$^2\times$T$^4$ geometries and
AdS$_7$ solutions found in the literature.
