[Risolto] Translating shortcode

Background of the issue:
I am using the WPML plugin to translate a page built with Elementor and the 3DFlipbook plugin on my website link nascosto. The specific page I am working on is link nascosto, where I need to translate shortcodes used by the 3DFlipbook plugin.

Symptoms:
When attempting to translate the page, the shortcodes do not appear in the WPML Advanced Translation Editor. Additionally, after making a copy of an item and setting its language, the item does not appear on the page.

Questions:
Why do the shortcodes not appear in the WPML Advanced Translation Editor?
Why does the copied item not appear on the page after setting its language?