None of the input modules work when the trackpad is installed on the right side. I’ve tried it with spacers and the num pad. I would like to be able to put the num pad on the left so I can enter numbers without having to take my hand off the mouse. According to the this guide, it’s supposed to work.
I’ve tried reseating the mid-plate cable with no success. Any other ideas?
I vaguely remember someone else having a similar issue not long after the Framework Laptop 16 was finally out. I do not remember what the solution was or if there was follow up on what corrected the anomaly.
I thought they were trying to use the trackpad on the right but it might have been a case where it only worked in the center. Some suggested looking at the connectors (pogo pins) and cables on the mid plate. You might want to contact support to start a ticket and see what advice they have. Surely someone has run into a similar issue before. Let us know how it turns out. 
I’ve filed a support ticket, we’ll see what turns up.