Page scroll interactions targeting class (to make interaction global)

Hi there Webflow folk,

I’ve set up a page scroll interaction where the navbar background goes from being transparent at 0% to white at 5%. The interaction is targeting the class on the element, and works perfectly. I thought that by targeting the class it would be site wide but it seems that I have to add the interaction to every page that I need it on. Is that correct? Or have I missed something that will enable the interaction, set up on a single page, to work globally?

Any thoughts?