I’ve downloaded the Camunda Modeler version 4.9 and added an input parameter analogous to your documentation Readme for the element-templates.
Why are parameters not grouped by input/output and toogles for parameters not shown as documented in the Readme ?.
I see the Templates tab, which is new, when coming from Modeler 3.8.* but the representation of an input/out parameter stays the same, no parameter grouping and no toogle.
With regards
Sönke