Power button stuck. Is it the proximity sensor?

Hello together. I tried to reach the dfu mode. At that, the power button unit slide down and was not clickable anymore. Now the button is not working. I can push the button a little bit down but it doesn't reacts or click.

I checked the proximity sensor and the button. I made a photo from the power button sensor and I dont know if the sensor is ok or broken. After the photo, I tried to glue a little pice of cardboard on the sensor but then the home button wasn't moving anymore. So I replaced the cardboard and glue.

So I'm note sure if I have to replace the button or the proximity sensor.

What do you think guys?