https://github.com/reinier/dotfiles/blob/main/hammerspoon/er...
It let's you hold down the right click key and use your mouse to scroll any x/y direction.
Original source for this hack is offline, but Internet Archive to the rescue: https://web.archive.org/web/20200808000102/https://savouryti...
BTW I use Figma all the time, I have never any issues scrolling with this hack.