Here's the information on how you can add Instagram pages to NapoleonCat.
If you have any problem with adding your own Instagram profile (as "profile managed"), please check if your Instagram Business page is connected to your Facebook page. Go to your Facebook page settings and check "Instagram" tab on the left-hand side of the panel. Your Instagram page should be there (marked "3" on the screenshot below).
Once you've got that, go ahead and check if your Facebook page is connected to your Instagram page on Instagram app level. Go to "Edit profile" in your Instagram app and check if your Facebook page is connected (marked with an arrow below).
Please remember that you have to be logged in to your Facebook account while adding an Instagram managed profile. Also, double check if you have access to the Facebook page connected to your Instagram account. Make sure that you are logged into the right Facebook account.
If you're still having trouble adding your Instagram Business page, please send us a message to firstname.lastname@example.org or drop us a line in the in-app communicator (you will find it in the bottom right corner of NapoleonCat app).