SPARK Controls are compatible with the Web PD. You should be able to use the Responsive Sensor in Client Side Human Services. In the latest release 4.3.3 is when responsiveness (in the Web PD sense for the 3 device modes) was enabled on a set of controls within SPARK. I suspect only those have been enabled for the responsiveness have marked with the “Intended for use of multiple devices” indicator.
I will confirm with the dev team and let you know something when I hear back.