Where exactly? Visible through your rose tinted glasses? There is no visual hint on the page (RSS has a well established logo) and my rss reader does not autodiscover it from the main page.
Inoreader or Feedly list plenty of RSS links for DW
Give me a break. You literally just type dw.com/rss. Logotypes or not this is pretty much a default address for RSS discovery.
Having to type the URL manually is very poor discoverability. Most people don't use the internet this way