Connect Instagram to Facebook
Making use of Facebook's Page interface
1. On Facebook, navigate to the business' Facebook page.
2. Click Settings.
3. Click Instagram in the sidebar.
4. Click Log in.
5. Enter your Instagram credentials. Click Log In.
Using Facebook's Business Manager
1. On Facebook's Manager, click Service Settings.
2. Click Instagram in the sidebar.
3. Click Include.
4. Enter business' Instagram credentials. Click Next.
Optional: Connect any kind of relevant Ad accounts. If you do not desire to include one, click Avoid.
5. Click Done.