Massive +1, when I first started using Vivaldi and saw rocker gestures, I was surprised scrollwheel gestures weren't already either right next to it, or outright part of the same feature. I used to use RMB+SWU/SWD via extension on Firefox for Scroll Page To Top/Bottom, but I'm not a fan of gesture extensions on Chromium-based browsers and didn't want to install one for this one thing.
Certain I've seen this feature request in another topic but this was the only one I could find.