Why can't I see the Instagram Page I want to add?
Click Socials and then Connect profiles
Once you are redirected go ahead and click Connect
Click Edit access
Make sure the page that you need has approved access and then exit out
Note: make sure you are connected to your main Facebook profile, where you have an Instagram Business account that you want to connect
Go to Facebook.com. Go to the top right corner and click on your profile picture, then go ahead and click settings & privacy
Scroll down until you see Business integrations and then click View and edit.
Make sure everything Is checked and then click Save
Follow the instructions from the second solution, but instead of clicking View and Edit, click Remove
Go ahead and click Remove
After this go-ahead and reconnect back to Instagram, you can find the article by clicking here