Hi, @JonAnder_Amante,
Please consider the following aspects: S32 Design Studio is an IDE used for debugging, but its absence does not affect the proper functioning of the toolbox. S32 Configuration Tools is the utility through which you configure pins, clocks, peripherals, and all necessary settings required to build a model. It can be confusing because S32 Configuration Tools is also integrated into S32 Design Studio, which may lead to some misunderstanding. However, for the current situation, installing S32 Design Studio is not required.
Furthermore, what you see in the image is not empty. You have simply selected the Functional Group named Adc_Pins_MBDT from the dropdown menu in the top bar, which displays only the pins configured for the ADC peripheral. By clicking on the Functional Group section, you will be able to select the pins you need.

The image you presented is from the Pins tab, but by switching to the Peripherals tab, you can view the configuration settings for each individual peripheral. Similarly, you can switch between tabs depending on what you need to modify or inspect: Pins, Peripherals, or Clocks.

Hope this helps,
Dragos