The specific file extension .rar combined with "P2P" in the filename strongly suggests this is a of the game.
: Added eight new maps inspired by diverse biomes including African and polar regions. Cities.Skylines.v1.16.0.f3-P2P.rar
: Pirated versions cannot access the Steam Workshop, which is essential for the mods and assets that define the Cities: Skylines experience. The specific file extension