I think he's talking about some older add on someone may have made. If you google "Dawn of War 1 Tyranids", images come up from I think Dark Prophecy Mod, Ultimate Apocalypse and some other mods that somehow ported DoW2 Models of "some" of the Tyranids into Soulstorm.
Although one of the results is a Youtube video titled "Dawn of War Unification Mod - Tyranid Swarm Gameplay" from 2018 with what clearly looks like Dawn of War 2 models for the Carnifex, Swarmlord, and firing effects on Termagaunts weapons from DoW2, even most of the troop icons are DoW2 Icons.
Deathz_Jester
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