Docker on macOS doesn't have the same underlying system support as on Linux, which is where Docker originated.
The Docker experience on macOS is also marred by the fact that Docker Inc. appears to have limited interest in their Docker Desktop offering, whereas a third-party alternative like Orbstack provides a much better experience.
The initial investigation which triggered the arrest was made by the OFMIN ("Office spécialisé dans la lutte contre les violences faites aux mineurs" basically the government branch tracking and fighting CSAM).
Supposedly, Telegram (and by definition of the french law, the CEO) did not respond to requests for takedown of harmful content (or not enough or faster?) from the the OFMIN. This triggered another investigation looking globally at how Telegram handle content moderation on the public part of Telegram (Channel) which lead to all others charges of complicity.
This is basically the CEO taking the fall because the (unreachable by french law) Telegram company is not on french soil and he made the mistake on landing here.
https://support.apple.com/en-us/102188