This is a rumor, but it appears Ubisoft and some others are trying to pressure Steam to remove player counts from their games, due to their low player numbers.
Report: Ubisoft Wants Steam to Remove Concurrent Player Counts
https://mp1st.com/news/report-ubisoft-wants-steam-to-remove-concurrent-player-counts
According to Fandom Pulse (paywalled), a Ubisoft insider has revealed that the company has asked Valve to remove or hide the concurrent player count data for its games on Steam. Ubisoft is reportedly unhappy that gamers, the press, and investors can easily see how poorly their games are performing, especially with tracking tools like SteamDB that show the number of simultaneous players.