Klaviyo back in stock button not working - Motion theme

I am trying to set up Klaviyo’s back in stock button and alert flows, but they don’t cover the Motion theme.
I need help locating the code in my theme file that would be altered or removed to allow the “Notify Me” button to show when products are marked out of stock.

I am trying to avoid hiring a developer as it seems like an easy enough task of just editing one line of code. Can someone please help?

The image I provided is from an example from a different theme. I am unable to locate this same type of code in the Motion theme… This is what I need help with.