Controller aim assist doesn't work in Apex Legends on Steam.

I purchased a controller called GameSir T4 Cyclon Pro.
I connected it to my PC via USB and it was recognized as an Xbox controller on Steam.
Then, when I set up the controller in Apex Legends and tested it at the shooting range, aim assist was not enabled.
Aim assist doesn't work no matter what settings I use.
I have no idea what the problem is, please help.