It is unusual for a bike to have the turn signals.
You mentioned Germany. Germany (as the most of other European countries) allows so-called S-Pedelecs, which are similar to the U.S. Class 3 e-bikes but are type approved, subject to registration and third party insurance. S-Pedelecs are equipped with numerous safety features including the stop indicator. S-Pedelecs undergo similar requirements as ICE mopeds.
Having said the above: No Euro S-Pedelec is equipped with turn signals. The rider has to resort to hand signals while riding an S-Pedelec. (Specialized had a plan to equip their 2017 S-Pedelec with turn signals but resigned from doing that as it was totally unnecessary and complicated).