You are welcome to preschedule Instagram carousels with Fanpage Karma! Unfortunately, automated publishing is not yet available due to the API. As an official Instagram partner, we will be one of the first to be able to offer that feature for you. But as of now we must wait until Instagram allows third-party tools to do that.
Instagram Carousels (as well as Instagram stories) can be easily published using ‘Fanpage Karma’ app. Our new app serves as a ‘bridge’ to transfer your content to a mobile phone where the Instagram profiles are accessible. You will find more info about our app here: https://www.fanpagekarma.com/updates