Is S.T.A.L.K.E.R. 2: Cost of Hope on Steam?

No. S.T.A.L.K.E.R. 2: Cost of Hope is not distributed on Steam, so there is no Steam Charts or SteamDB player count for it. Its live popularity is tracked here via Twitch viewership instead.

What platforms is S.T.A.L.K.E.R. 2: Cost of Hope on?

S.T.A.L.K.E.R. 2: Cost of Hope is available on Xbox Series X|S, PC (Microsoft Windows), PlayStation 5.

S.T.A.L.K.E.R. 2: Cost of Hope

Role-playing (RPG)AdventureXbox Series X|SPC (Microsoft Windows)PlayStation 5

S.T.A.L.K.E.R. 2: Cost of Hope — frequently asked questions

Is S.T.A.L.K.E.R. 2: Cost of Hope on Steam?: No. S.T.A.L.K.E.R. 2: Cost of Hope is not distributed on Steam, so there is no Steam Charts or SteamDB player count for it. Its live popularity is tracked here via Twitch viewership instead.
What platforms is S.T.A.L.K.E.R. 2: Cost of Hope on?: S.T.A.L.K.E.R. 2: Cost of Hope is available on Xbox Series X|S, PC (Microsoft Windows), PlayStation 5.

About S.T.A.L.K.E.R. 2: Cost of Hope

The first major expansion for Heart of Chornobyl coming this summer, including a huge new storyline that can take dozens of hours to complete, two new regions, new and returning characters, and much more.

Summary via IGDB.

S.T.A.L.K.E.R. 2: Cost of Hope on Wikipedia

S.T.A.L.K.E.R. 2: Heart of Chornobyl is a 2024 first-person shooter, survival horror video game developed and published by GSC Game World. It is the fourth main game released in the S.T.A.L.K.E.R. video game series, as well as the first S.T.A.L.K.E.R. game in 15 years since the release of Call of Pripyat in 2009.

Source: Wikipedia (text under CC BY-SA 4.0).