As I can judge, none of the finalists in the NASA's 3D printed habitat challenge uses aerogel.
Why so? (given that you can 3D print aerogel)
One of the most daunting challenges to building structures in space, or on a body such as the Moon or Mars is the unavailability of good quality fabrication materials, so you either need to transport them from Earth at great cost, or transport processing equipment to make them from raw material already available in space.
Since aerogel can be remarkably space-filling, the mass of precursor per cubic meter of final product that would have to be transported from Earth for aerogel is a tiny fraction of that for conventional materials.
So I'd like to explore if 3D printed aerogels might be useful as a part of fabricated space habitats.