The ‘switch’ function doesn’t appear to work, however pressing the physical switch on the unit will toggle. Problem is, some of our house users are still wanting to use physical switch (S1 / S2).
So, the answer is yes… I was missing something. The template didn’t work via the GUI settings, however pasting in the template code did.
To do this, from the Tasmota GUI, click [Configuration] > [Configure Other] and paste in the following (from the blakadder link)