The European Union Aviation Safety Agency (EASA) has the authority to act independently of FAA, but they used to mostly follow FAA since they have direct access and oversight of Boeing, them being a US company. But that started to change in 2019 with 373 MAX groundings. It exposed how FAA were incompetent and believed Boeing lies about MCAS. EASA didn’t follow FAA directive to unground them and required some additional procedural changes, combined with relevant training modifications, before ungrounding.