Nico brought up a list of supplies that she expected they would need and some improvisational materials that she would pack in the ship as spares. The ship had a very comprehensive repair bay on board and could take care of nearly any damage that the Mecha might have sustained.
They had plenty of raw materials, as well as biomatter, available for an extended mission. If nothing else, they could return to the anomaly and this side if they were in desperate need of supplies and couldn't get anything on that side.
It sounded like there were multiple intelligent species there, though, so it shouldn't be too much of an issue finding some sort of biomass that they could work with, assuming that their composition was close enough that the Replicator system would recognize it.