There is no HTML files when I create app

Hi all
Please help me solve the problem:
I’m working on a configurator for my client and I want to build UI with HTML. But at the same time I use Puzzles for logic in the app.

There is no any HTML file in my App to hook it with the UI html.
Here is what I see when I’m creating an App in the app manager: https://i.imgur.com/4ZiNuEv.png
It does not generate HTML at all. (there is no that blue button when I create an app with Puzzles)

But it differently should be there, here is what I saw in a tutorial https://i.imgur.com/2ialCaO.png (source: https://cgbookcase.com/tutorials/how-to-create-3d-interactive-web-experiences-in-blender-verge-3d)

I work in Safari 12 (macos sierra)

Please help me I do not know how to get the html file with Puzzles, I get only GLTF when I export.

M