An update: I got my hands on 4 Qolsys IQ Smart Plugs QZ2101-840. I removed the Aeotec Switch 7s from my Z wave config, and added the Qolsys devices (first exclude them, then include them). They appear to turn on and off as expected via the Panel 4, and remotely via alarm.com website. However, two of them repeatedly fail the Z wave network rediscovery. But they do seem to work. I will check on how well the automations execute tonight.
I will be re-purposing the Aeotec 7 switches in a different house with HomeAssistant, which appears to work fine with them. But this episode does raise some concerns for me about the z wave capabilities of the Panel 4. If z wave compatibility is so tightly limited with the Panel 4, it gives me pause about buying additional Panel 4 devices for other locations. For example, I am interested in installing some Zooz Zen51 and 52 relays so that I can keep my existing light switches but be able to automate them. I don’t see the Zooz devices on the compatibility list for Qolsys. Will these work with the Panel 4 ? Or should I be looking for an alarm panel with no z wave integration/automation and use another hub/HomeAssistant for automation ?