Need help figuring out what this sensor is!

Hello, I need some help what this sensor is and what it does, its on the Clio 3 Sport 145kw.
The car seems to be having an issues with the VVT system, at one point in a drive it just loses the power gain at 4k and beyond RPM, so im wondering if this has to do anything with it. The power comes back after shutting the car off and back on again, but still loses it after a short while. When it does the car feels very sluggish.IMG_0323.jpegIMG_0322.jpeg