Message Body Structure Stored in Database

that’s exactly what flamingo does…

is that what you’re referring to?
https://contactform7.com/save-submitted-messages-with-flamingo/#customizing-subject-and-from-fields-in-messages

flamingo_email: “[subject-field] [message-body-field]”

Thank you so much!

One more question, is it possible to display the Flamingo table on the front-end Page?

in theory yes, because the mail are stored as a custom post type, but I do not know if is correct for security reasons.