Lazy load background images

I’m trying to lazy load the background images on a new website I built
using the plugin.

I have given the div’s containing the background images a class of lazy and
in the before body tag I’ve added:

Am I missing something? Is there a easier way to do this in 2020?

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

Hey Olle, did you get it to work?

Thank you

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