Almost all ebikes are limited to 25km/h here, which is a reasonable speed in my opinion. It makes cycling accessible to everyone regardless of fitness level or hills, but it also ensures that ebikes go at a similar speed as most other riders (most riders on the cycle paths go between 20 and 30 km/h (12-19MPH)

There are some people who modded their ebikes to go faster, but I've only encountered them very rarely.