Steam game listings will show support for PlayStation controllers | PCWorld
Steam Deck Wired USB Gaming Touchpad with Keyboard and Mouse Funciton, Trackpad Game Controller for Valve
Amazon.com: TouchProtect for Steam Controller - Enhance Tactile Feel, add Style, and Protect Your Trackpads. for Steam Controller and Vive Controllers (Hex - Black) : Video Games
Easy Steam Deck Mod! TouchProtect HEX is here. Best selling Trackpad mod for Steam Deck. — Colored Controllers
TouchProtect for Steam Deck - Front Trackpads — Colored Controllers
Joystick for The Steam Controller, Touch Pad Thumb Stick Analog Stick Provides Precise Movement Control for The Steam Controller (Black) : Amazon.sg: Video Games
The Steam Controller's troubled trackpads made for a better Steam Deck - The Verge