I already try this in a html file. But than this happens.
Replit dont accept html iframes. Thats the problem.
Edit: Its german:
replit refused the connection
But when I paste the example (https://replit.com/@ritza/demo-embed?lite=true#main.py) its worked.
So that is my test Link. https://replit.com/@Basti-HDHD/TestWebApp#main.py.