"Viewed page" Klaviyo custom metric not working on PageFly landing page

[NicaLILY]

Hello Shopify experts! So I created a Thank You page that customers will be redirected to after submitting a review via the RYVIU app. 

This page was made with PageFly. 

By following the steps outlined here, I added the Klaviyo custom metric "Viewed Page" to this page.

-->  https://help.klaviyo.com/hc/en-us/articles/360059075151-How-to-Create-a-Custom-Viewed-Page-Metric

When Klaviyo support checked the web source for this page, they said they couldn't find the snippet inside. It is weird since I tried this on one of the pages "Contact Us" and it worked.

This is where I added the snippet code:

This is the Thank You Page that I created, but it is not done yet. ----- https://lilysado.com/pages/thank-you-from-lily-sado

I'm not sure where I missed out. The only metric that's working on this page is "Active on Site". 

Thank you so much!

@EveryonesHero @Revery