You use the developer tools and go to the events tab.
In the lower part you can enter a listener, so type shelly.click there and then start listening and activate the buttons.
Thanks for your reply. The only difference is that while both types of switches report click_type (as shown in my automations) the shellyplus also reports btn_dn and btn_up. Presumably, that shouldn’t matter but I’m wondering. The action is identical in both cases, so I know it works (for the shelly2.5). I also know I’m hitting the alarm service with the shellyplus automation, since the alarm tells me it is disarming. I get the feeling that maybe btn_dn is hitting it (arming) and btn_up is hitting it again (disarming).