Here's another way of achieving a full page/section sticky with a pagination indicator using PagePilling.js. Here are some notes. Start with a div with ID pagepiling. Within the div create several sections with the class section. Make them a height of 100VH. Add the code found on the page to your head tag. Add the code to your body tag. You can then customize it with anchors, scrolling speeds and navigation based on the GitHub here: https://github.com/alvarotrigo/pagePiling.js/
I help progressive orgs create stunning websites and fantastic digital strategies so they can increase support and grow movements.