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Scrolling Effect Problem

Hey guys,

I am a photographer and want to build a site for my business. I have a site from another creator which is my template and i want to recreate it. Here is the link:
https://niklaskamp.com/
I try to do that scroll transition where the text has this outline effect and gets solid while scrolling. I tried the same with the absolute position and z- index but it only is working for the first headline, after that the z index is to high, so the headline 2 is always solid.
Does anyone has an idea how i can recreate this effect? Maybe with an easy method or an add on?

Here is the link to my site:
https://preview.webflow.com/preview/pq-production?utm_medium=preview_link&utm_source=dashboard&utm_content=pq-production&preview=2271f48c77147448f957be74a296f724&mode=preview


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