"Thank you" page with summary

Hello,

I use "Prime" theme. It has contact form without "Thank you" page. I created it. However, I would like to have "Thank you" page with summary of what someone wrote - like is "Deliver"or "SoraArticle" theme.

How can I do this?

One way is to set your "Thank You" page to run with the formdata.html.twig template, to do so, just rename your page markdown file as formdata.md