Does anyone know where to watch Naruto Shippuden's 21st season? They don't exist on Netflix and Tvnow yet. And are there still more seasons or does it end there?
Free and legal on Crunchyroll
Legal with German subtitles on Crunchyroll: https://www.crunchyroll.com/...-shippuden
So here you can legally stream season 21:
Amazon (fee-based)
Crunchyroll (free)
Otherwise illegal.