Can I put a regular 2-person mattress on a 2-person electric boxspring?

Not just like that. A two-person electric boxspring has two separately adjustable sleeping surfaces, one per sleeping side. Put one unbroken 2-person mattress on top, and it can't move along the moment just one side adjusts: the mattress on the other side simply gets pulled up or down with it. So you either need two separate single mattresses, or a mattress specifically split at the head and foot end for electric boxsprings, so each half can move independently. If you're not sure, check with a Revor retailer which options fit your electric boxspring.