DualShock 4 compatible with Steam Deck ?

Features

Buttons

Yes

Vibration

Partial

Gyro

Yes

Touchpad

Yes

Notes

SteamOS runs the same Steam client that added native DualShock 4 support (Steam Input, with touchpad and gyro access) back in 2016, so it works out of the box on Steam Deck over Bluetooth or wired USB. Because most Steam games default to an Xbox-style button layout, on-screen prompts and default bindings can look mismatched until remapped.