Non-existent. Valve only supports TF2 on PC via Steam .

Valve has not released a native mobile port of Team Fortress 2. Official apps from Valve Corporation on Google Play are limited to the Steam Mobile App, Steam Link, and Dota Underlords . Play Store "TF2" Options

: Many unofficial ports are frequently removed from the Google Play Store due to copyright (DMCA) issues. Crate Simulators : Some available apps, like the Crate Simulator for TF2

Despite the current lack of an app, the demand for Team Fortress 2 on the Play Store remains high. The success of hero shooters like Overwatch 2 (which has no mobile port but faces similar demand) and mobile-native hits like Valorant Mobile suggests there is a market for class-based shooters on Android. However, Valve’s current focus appears to be on the Steam Deck and PC hardware rather than mobile game development.