If you liked this
Games like Stellaris: Lithoids
If you finished Stellaris: Lithoids, the closest matches are Hardspace: Shipbreaker, Jurassic World Evolution 2, Distant Worlds: Universe, Ashes of the Singularity and Cosmoteer: Starship Architect & Commander. All 10 share its real time strategy (rts) genre and are ranked by how closely their themes and modes overlap.