Liam thinks it's time for something "familiar", like a day out on Aya. He also mentioned "getting your eyes on something", but wasn't specific about what he meant.
This side quest is obtained while on board the Tempest after having completed the priority mission A Trail of Hope and the prompted conversation with Liam about what he brought to Andromeda. After completing both, talking to Liam after this on board the Tempest will prompt a conversation with Ryder that they need some down time on Aya.
Talking to Liam will reveal that he wants to spend more time doing things out and about when not on the Tempest, then prompting Ryder that they should spend a day out in the marketplace on Aya. Talking to him at the Tavetaan will then further the mission, asking Ryder to scan supplies belonging to the hostile vendor in the marketplace. When scanning the supplies however, a security guard will prevent Ryder from acquiring the data from the scan, prompting Liam to express his rage over the comm and asking Ryder to come back to the Tavetaan.
Talking to Liam again at the Tavetaan will prompt a conversation saying that Ryder is safe out of sight, as to which Ryder expresses confusion in regards to the situation. Liam then explains that the scans were used as an attempt to find data provided by Verand that would help food yields at Initiative outposts, but calling them off to avoid conflict. He also reveals that he wanted to obtain angaran methods of survival, and how he was blocked by them and the Nexus when wanting to share information.
Ryder can then be understanding or act hostile towards Liam's actions, as to which both yields a response that he didn't intend to get either side to get angry and that he doesn't blame them. The conversation then ends with Ryder and Liam agreeing to leave the marketplace alone and to not push their luck, thus concluding the mission.