Earlier quoted context omitted.
That's true for the entire EU too. The minimum is 20, or slightly above that.
Pretty common in Germany are 30 days.
Moreover, taking sick days is normalised and you will not be punished for it unless you abuse it. If you take below 30 sick days a year, you're likely safe.
My job is to help people settle in Germany. I struggle to communicate how chill German work culture is.