If a legitimate French business contracts with a Moroccon call center, they will then of course follow French law since the French business is liable.

As for international scam calls, not sure what the situation is in France and what measures they have in place, but one relatively easy way is to block international callers from spoofing a local caller ID, which decimated these calls in Finland a couple of years ago: https://traficom.fi/en/news/obligations-regulation-come-effe...