the l3 button on my Xbox One controller has stopped working, i was wondering if this is...

Hi and thanks for reaching Microsoft Xbox gamer's community. My name is Josef.
I'm an Independent Advisor and a Microsoft Xbox user like you.

Hope you're doing great today despite this Energykid25

This really depends on the damage, you can get the controller inspected in the closest authorized retailer or where original parts are used in order to determine if worth repairing the controller or you may get a new one

Dang!

I cannot configure my controller to the mapping above... No wonder this game designed for 4 button joysticks :/

I must get accustomed to the one working stick (left) and that the fire is not the RT.

But the life doesn't stops here...

If the buttons are sticking all you need to do is clean it. I bathed a friends controller in WD40 because I was tired of losing at FIFA because the buttons stuck. Worked wonders, though it didn't stop me losing.

I'm having similar issues with my xbox one controller connected through usb on my windows 10 pc. The controller just stops working mid-game. If I alt-tab out and into the program is starts working again but quickly stop working. When testing the buttons
using the xbox accessories app - test mode shows no buttons being pressed. Not sure what's going on. Let me know if you found a solution. Thanks.

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Could be because I bought my first xbox in Italy and this one come from UK??

The hardware of the Xbox One is "region free". So with the exception of the external power supply of the old Xbox One, every accessory will work with every Xbox One console.

As for the controller not connecting: Try connecting the controller with a Micro USB cable to the Xbox One S, and then check that you are able to control the console.

If it works via USB cable, open up the Xbox Accessories App, and make sure the controller has the most up-to-date firmware. Be careful not to break the connection during the firmware update, as this will leave the controller unusable, and it has to be sent
in for replacement.

After the controller has been updated, it should be automatically be assigned to the console since it was connected to the console via USB.

After you remove the USB cable, the controller should now work with the console.

If not, you can try to re-bind it by pressing the small button on the front of the controller, and the Bind button below the Power button of the console. If you press those buttons, the Xbox logo on the controller and console should blink, and eventually
stop blinking and be solid lit again.

Now the controller should work.