Modal blur effect

As I was watching Webflow University videos I had seen a modal effect on the video talking about sizing. Specifically the section on VH, VW.
There was a modal that had a background that was maybe 30% opacity and it was blurring the page behind it. Not the entire page, but only what was being seen through the modal’s background.
I’ve been googling like crazy but can’t seem to find that particular effect.

Does anyone know how I can duplicate this effect?

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

Is this the effect you’re looking for?

Thank you! That was exactly what I was looking for.