How do I get .variant-radiobtn-wrapper to work ?

Hi! I am working on a shop and I want to display the product variants as radio buttons instead of in a dropdown menu. I found the class .variant-radiobtn-wrapper in the code , so i disabled .variant-select-wrapper  to only show the radio buttons. It seems now that the radio buttons are not functional... My client really wants these radio buttons, so does anyone know why they are not working and how i can make them functional?? Thanks in advance! Sofie