I've created a textarea as a custom field with MetaBox.
In the Elementor Theme Builder, I've put a Text Editor Widget on the page, and assigned the Metabox textarea field as dynamic content.
I've created then a new wordpress article, and using Gutenberg (not Elementor), I've added three lines of text in the textarea, with a "return" at the end of each line. So "\n" are stored in the field.
But when I look at the page, the 3 lines are on the same line. Basically, the "\n" where not converted to "<br>".
I've already asked the guys from Elementor, but they can't do anything about that.