A Galaxy with 400 Billion star systems...and this is all we got?
Technically we have HEAPS of Aliens
Besides Humans, and Thargoids (and what ever Guardian AI still living in the Milky Way of any) we have
Thousands of Earth Life worlds & Water Worlds with Carbon-Water based life
A Good Number more Ammonia Worlds with Carbon-Ammonia Based life
A Sizable number of Gas Giants with either Carbon-Water based life or Carbon-Ammonia Based life
Granted the life could be single celled life, algae, and litchens for a lot of the worlds but from the rare goods and other in game info suggests alot with have "Plants and Animals"
Aside from that we also have
Space dwelling Mollucs:
Bell Mollusc
Bulb Mollusc
Bullet Mollusc
Capsule Mollusc
Gourd Mollusc
Parasol Mollusc
Reel Mollusc
Squid Mollusc
Umbrella Mollusc
Space based plant life
Aster Tree
Gyre Tree
Peduncle Tree
Stolon Tree
Void Heart
The Microbes that form the Space Crystals and Calcite Plates
Planet based
Barnacles, as it is suggested they were something the Thargoids found and engineered
Sinuous Tubers
Amphora Plants
Bark Mounds
Brain Trees
Anemones
The E, K, L, P, Q & T -Type Anomalies could be Sentipart's for all we know
Alien life mentions in Galnet or as Rare Commodities
Giant Irukama Snails
HIP Proto-Squid
Mukusubii Chitin
Uszaian Tree Grub
Mulachi Giant Fungus
Kachirigin Filter Leeches
Verrix
Ling Lang
Baltah'sine Vacuum Krill
Banki Amphibians
Various game animals of HIP10175
And then the Extinct Guardians, and the Aliens of Achenar.
The galaxy is full of life, teeming with it, it is just not much of this life has FTL Star Ships at the same time as humanity