What is the content you are translating made with?
WPML breaks up content made with page builders (including the core Gutenberg block editor) into smaller chunks when generating XLIFF files, but it doesn't break up the post content if it is made with the classic editor, and if you use a page builder and add text modules, all of the content in a single text module would be one entry in the XLIFF file.
If you have used ATE to translate text (WPML's Advanced Translation Editor) you will have noticed that it breaks text up further into individual headings and sentences. But that is a feature of the ATE editor itself, not of WPML directly, and WPML breaks up content as described above.
We use Elementor page builder. The last time I use XLIFF export, I get separated texts in the XLIFF file but now it doesn't work. Is the any solution with Elementor page builder?
What you should see with Elementor (actually the same as with other page builders) is that where you have separate modules within Elementor, those will be broken into separate texts within the XLIFF file.
So if your Elementor page had
Heading module
Text module
Heading module
Text module
Button module
then each of the texts belonging to each module would appear separately within the XLIFF file.
If one of your text modules had 6 paragraphs, all 6 paragraphs would appear together as a single entry in the XLIFF file.
Sorry, there isn't really anything I can do about that.
I've described how it works, how each page builder module is one text element in the XLIFF file, but there isn't a way to change that.
Splitting the texts into individual sentences is a feature of the ATE editor. If you don't want to use that, it could be that other translation services or editors might have a similar feature.
This ticket is now closed. If you're a WPML client and need related help, please open a new support ticket.