Hello,
1. The website is developed with Elementor Pro and the Hello theme.
2. I have only tried to translate two pages, I will send you a screenshot of the pages in Spanish and English. They have the pencil, when I open the translation it says 100% finished....
3. I have deactivated all the plugins except Elementor and Elementor Pro, and wpml and the two pages are still not displayed.
That is strange. Try to make a tiny change to the original page, update it, and finish the translation once again.
If this is still the issue, I need to request temporary access (wp-admin and FTP) to your site – preferably to a test site where the problem has been replicated if possible – in order to be of better help. You will find the needed fields for this below the comment area when you log in to leave your next reply. The information you will enter is private which means only you and I can see and have access to it.
Thank you for the provided information. Could you install the WPML String Translation plugin and make a tiny change, update, and complete translations again?
You can installed from Plugins → Add new → Commercial.
One of the requirements for translating Elementor pages is the WPML core plugin and WPML String Translation add-on.