It’s probably because the average American wasn’t watching Sandmännchen while they were growing up.
And I’m sure there are radio shows in Germany not paying attention to American media.
And I’m sure there are radio shows in Germany not paying attention to American media.
Here where I live I commonly see "touristic museums" and touristic places make claims that can be easily disproven by a google search and that is just not OK.
Imagine in a few decades some museum in US about media goes on to claim Arthur was the longest running kids show in the world and even link to npr as a source?
npr should have known better and put "In US" in their title.