Customizing Span Text with image underline

Hope I can find some help here.

I’m trying to add an image to a text span to achieve this.

I know how to do this with code by adding an ‘:after’ class and import the image URL in CSS, but in webflow are my images uploaded to a CDN? And are the images links found in the asset manager usable?

Here is my site Read-Only: LINK
(how to share your site Read-Only link)