Some computers have it some don't. All computers do the 2 finger scroll on webpages, file managers, text editors, apps and softwares, etc. However there are some computers which do not have 2 finger scrolling in the fences. Namely Asus and Razer Blade. I think it may be a difference in the touch pad drivers where Elan do not.
However the Elan touch pads do scroll on most apps as I said in the first line. Synaptics touch pads seem to have no problem scrolling in fences. I think this remains a mystery that is unsolved since I first brought it up in late 2018.
I did notice that my Synaptics touch pad has lost the ability to 2 finger scroll in fences when it has only been moved over the fence, and not clicked on the fence yet. I did no Windows update, and no fences update for this change to occur. This is a bad change. I prefer when I can 2 finger scroll just from moving into the fence, but not clicking it. It may have something to do with an update to the Rainmeter exe. I have been looking at my having updated the Rainmeter .exe I am using. This is possibly the only change to my one Synaptics touch pad computer. However I still do not install the Rainmeter .exe and only run it as a portable executable that I keep in my taskbar. This may be a source of some of the issues. Perhaps a starting point for software designers would be to try to work with the Rainmeter which is also a very important desktop customization program.
Again it seems that Elan drivers which do run with 2 finger scrolling on all apps and such, are the problem here and that would be the second point that Fences software developers would need to look at. I should add that I have a brand new subscription and have bee using the newest fences software on a Razer Blade computer with a Razer Blade Pro touchpad, which I think very closely resembles the Elan touch pad on an Asus ROG I use at work.