I haven’t found a perfect solution yet.
I have found an app called Multitouch by Ryan Hanson that can be set up to simulate a right click in the bottom right corner. You have to configure it within the app and then run this command in terminal to expand the right click area:
defaults write com.brassmonkery.Multitouch cornerTouchAreaLength -float 35
Note that 35 here is the default value, so you’ll want to adjust it higher.
The biggest issue I have with this app is the lack of palm rejection. If you are even slightly touching the touchpad with your palm the input into Multitouch won’t be recognised.