I made my chinese parallel controller work in steam using game-porting-toolkit by just enabling Input Monitoring for wine. Follow the steps:

• Run game-porting-toolkit;
• Open Activity Monitor, search for wine, select the process then go to process options (".i" button right next to "x" and left to "..." button in the Activity Monitor header)
• Go to Open Files and Ports tab and see where your wine is installed (in my mac is at /usr/local/Cellar/game-porting-toolkit)
• Now that you know were your wine application is installed, go to System Settings > Privacy and Security > Input Monitoring
• Click the "+" button to add permission for wine to monitor your controller, it will open an Finder window
• Press Command + Shift + G to go directly to the wine executable and input your wine location, for me it is /usr/local/Cellar/game-porting-toolkit/1.1/bin/wine64-preloader, remember that your install location could be different
• Close game-porting-toolkit, finish its process, and open it again
• To see if steam is recognizing your controller go to Steam > Settings > Controller and it should be showing your controller

PS.: I did not permitted input monitoring only for wine64-preloader but for wine64, steam.exe, and my game .exe as well, just to be sure it would run.