How to embed my rss feed (fulltext)

Hi,

I have made a fulltext rss feed of a page and it works fine.
https://motogpmagazine.com/motogp-championship/feed?fulltext=1

But how can I embed this rss feed on my other site
https://www.rossifiles.com/motogp/news/world-championship/

I’ve used many wordpress rss plugins, but none of them shows this fulltext feed, they only show the title

Is there anybody who can help me please. I’ve been struggeling for days now, maybe a simple javascript feed reader?

Thank you
Vidal