The approval are only available for admins (only the admins accounts get this possibility). So the support provided me the solution that I need to have the customer as admin, but for me that's not a solution as admin really access everything and contents could be lost (as they're not used to this kind of platform). I mean there's no way to avoid any technical mishap and have this approval workflow working properly yet 😔 ? With a customer approval section and comment section for changes / improvements of the posts.

Thanks !