How to Link Instagram to Facebook Page
Using Facebook's Web page interface
1. On Facebook, navigate to business' Facebook page.
2. Click Settings.
3. Click Instagram in the sidebar.
4. Click Log in.
5. Enter your Instagram qualifications. Click Visit.
Making use of Facebook's Business Manager
1. On Facebook's Business Manager, click Business Settings.
2. Click Instagram in the sidebar.
3. Click Include.
4. Go into business' Instagram qualifications. Click Next.
Optional: Attach any type of relevant Ad accounts. If you do not want to include one, click Miss.
5. Click Done.