Not in the Netherlands. They are not allowed for any age players unless it complies to certain rules. If the content of lootboxes are not transferable they are not forbidden. Gambling is strictly regulated here.
Volunteer that your games are not meant for children and permanently submit your cash cow games to legislative scruitany? It'll never happen. If legislated across the world, they still wouldn't admit that their products 'could cause harm's. Why open yourself to the liabilities? No, they'll just do everything they can to prolong the greed.