There's already a way to mount your smartphone to a Steam Controller

Mechanism, the company behind a "gaming pillow" for the Steam Deck and a growing list of grips for handheld consoles and PCs, ...

This accessory can snap a Steam Controller to your phone — or almost anything else

The same day you buy your Steam Controller, you can get a useful accessory.
MacSources

EasySMX M20 Review: Premium Mobile Gaming Controller at a Budget Price

The EasySMX M20 is made by EasySMX, a company that makes gaming controllers and other gaming accessories for people who play ...

Transform your new Steam Controller into a makeshift Steam Deck with this accessory

When the Steam Controller launches on May 4, you may want to also get this accessory that lets you mount your phone.
Hosted on MSN

Android 17 beta adds long-awaited system-wide controller remapping

Google is introducing system-wide controller remapping in Android 17 Beta 2, letting users customize button layouts for any connected gamepad without relying on individual game settings. The feature, ...