When you create your Instagram page for your dealership or brand, make sure you select to make it a business profile. This will allow you to connect it to your Facebook page.
Once the Instagram and Facebook accounts are connected you can then use your Pages Manager app on your mobile device to manage not only Facebook page notifications and messages, but also your Instagram comments.
You can also reply to them from within the app too. Give it a try today. When you select the inbox icon at the bottom of the page, you will then be greeted with an inbox similar to below showing the Messenger icon, the Facebook icon and the Instagram icon. Select Instagram to see your Instagram page notifications.
If you require any help, please use the support contact form on your dashboard.