25kmph and 250w, off the top of my head. You need to pedal for the motor to engage, and they count as a bicycle so no insurance needed. The twist & go bikes (no pedalling required) are basically motorbikes with pedals so they’re technically illegal but they’re still widespread. You’ll regularly see them in every city centre for food deliveries and you’ll see kids on them everywhere else.
The lack of bicycle paths is a big problem but I don’t think they’ll solve it entirely. The barrier of entry is just too low, any idiot can ride one and be oblivious to the danger as they weave in between people.