Form Radio Content does not show that its selected

Heya!

I copied a form from a guy on youtube, made changes to test it and it works like a charm:

https://formulario-comparador.webflow.io/

However, when I copied the “final” product to paste it on our main website, all of the Radio Buttoms are not displaying that they are selected. This feature works perfectly on the website above but not here:

https://tunergia.webflow.io/formulariocomparador

Would anyone have any idea on how to fix this? All classes are matching on the script, the css, html.

Thanks!

Here is my site Read-Only: Webflow - Tunergía