Since February 2017, Instagram has allowed its users to post photo or video albums. You can use this new feature to post immersive panoramas on Instagram. There are several solutions today and we will start with the simplest: use an application (iOS), in this case Panoragram for iOS. With an app like Panoragram, you don't need Photoshop or other image editing software to post a panorama in a multiphoto post on Instagram!
Steps

Step 1. Download Panoragram for iOS
The first step is simply to download Panoragram from the App Store by simply clicking on the following link: download Panoragram. The application is available all over the world and translated into Spanish, English and French.
Step 2. Open Panoragram
When opening the application, Panoragram will ask you to access your photos in order to display the panoramas from your phone! You just have to accept to see them appear in the list.
Step 3. Select the panorama you want to post
Now choose the panorama that you wish share on Instagram by selecting it from the list. A loading screen will appear. This means that the app is preparing your panorama for Instagram.
Step 4. Share your panorama on Instagram
Your panorama is now ready to be shared on Instagram. After checking that the preview matches your expectations, all you need to do is press the button. Share on Instagram to have your iPhone launch the Instagram app in the post creation view.
Once on Instagram, you will see the photos of your cut panorama appear in your library. You just need to press the multiple selection button provided to select the photos in your panorama in the desired order
Step 5. Press the next button
Post your panorama like a normal photo! Don't forget to tag @panoragram and add the hashtag #panoragram if you want Panoragram to see your post!