3 finger swipe up / down in Finder not working Catalina
I don't think there is an up/down swipe gesture to navigate pages - these clash with other swipe gestures like app expose and mission control.
So, to find other options:

Why would you need to swipe up/down in Finder?
Are you trying to switch between different windows of Finder or trying to switch to another app?

If you are trying to switch to a different window of Finder, you can press Command+` or use app expose's three/four finger swipe down. These commands/swipes work for all applications, not just Finder.
If you want to switch to a different application you can press Command+tab or use mission control's three/four finger swipe up.
If you're in Finder's list view and are trying to collapse/expand a folder, you can just press the Left key to collapse the selected folder or press the Right key to expand the selected folder.