Hey guys, thanks for the advice.
I figured out what was wrong. I went to turn off the extensions (resetting experimental features to default unfortunately didn't work), and I turned off my content blockers. Specifically, I used Wipr, and turned it all off (it comes in three parts).
Then I went to the website that is causing the issue, and it instantly offered me to "accept cookies", which wasn't available before. So I accepted, then turned Wipr back on, and the scroll started working.
So Wipr was blocking the cookies pop up from appearing, and I couldn't progress further to the website to scroll.