I tried to follow the documentation to add date and time selectors, but it’s not correct. I take here the Date example, but it’s the same with Time.
First, in “Adding a Date form element” you can read “There is an example of the Date element HTML in the file example-all-elements.html”. But that file doesn’t exist, at least in the version I bought today in Envato. Anyway, I created this html element in my form: