This thread is resolved. Here is a description of the problem and solution.
Problem:
I can't find how to translate the content added in some Elementor templates added to my pages.
Solution:
The content was added to some Elementor sections which are not translated, then the sections were added to a global template. To translate the content you need to translate those sections first.
After that, make a small change to the original page and update it then update the translation and check if you can see those texts in the translation editor.
You're using another section inside the Global widget which needs to be translated first, please click on this link which will take you to the Elementor templates library: hidden link
And click the (+) sign next to the "Revisioni – Guida – Normative" to create the translation for this content.
Then go back to the same list hidden link and click the gear icon to complete the translation of the global widget "Global Section – Revisioni Guida Normative"