Those are nice looking switches. . Schneider’s Z wave devices are manufactured by Merten, so in order to look them up on the official Z wave alliance product site you have to look for Merten.
The problem you have likely run into is that the Schneider device uses a very different set of Z wave commands then the popp/develo/wallmote Devices do. Those devices rely on “Central scene” commands, and that’s what their device type handlers are set up to process.
The Schneider Connect line doesn’t use those at all. Instead, it relies completely on direct Association, which is why it talks about the limit of five devices being controlled.
It should be fairly easy to set up this switch to control other zwave devices in the same room but the problem is going to be keeping the SmartThings mobile app in sync or using the switch with anything other than a nearby Z wave device. To do that, you have to include the hub in each of the association groups and it just gets more complicated.
@adamv might be able to say more about the best DTH to adapt for these.
We should add that the real heart of the Connect system is an in wall micro, not unlike the Fibaro micro.
It’s just that Merten has gone the full distance from a consumer standpoint and provided a selection of wall switches, including battery operated auxiliary ones, to go with the micro.
So with regard to other switches, @anon36505037 and others who have done a lot with the Fibaros might be able to share some of what they have done with regard to switches for those micros.