why is halo infinite on pc but halo 5 isnt?

like seriously I checked steam, and halo infinite is on there, but halo 5 isn’t? any explanations please?

Halo Infinite was designed from the start to be released on both Console and PC, while it may happen at some point Halo 5 wasn’t - development of Infinite, MCC and Halo Wars 2 have been 343’s focus.
Closing this off as it’s not a support issue