How do I add the_content function to blog single post page?

Hi
I am trying ot add some functionality to my single post blog pages. I have Elementor and since WordPress seems to have so little functionality for this process, it seems best to do it in Elementor. I understand that i have to call the_content to do this but I can’t work out how to do it.

I have been to this page: https://developer.www.ads-software.com/reference/functions/the_content/
which the Elementor Help center referred me to, but it didn’t help becausse I didn’t understand

1 how to add the line, the_content( string $more_link_text = null, bool $strip_teaser = false ), to the blog page

2 where I could find the single post blog page in the Dashboard

Can you help?
Thank you

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