Hello,

Recently Facebook has changed the interface and this new view is a bit confusing we shall update the manual accordingly.

As soon as your page has been created, you need to find the Instagram tab:
1. Click pages: https://gyazo.com/44c594a6f0c01a040c2a452723ec438f

2. Enter the page and find the menu on the left, scroll it to find “Settings” then scroll and find the Instagram tab https://gyazo.com/edb0b8757f198efedd6d14da54013a51

Please let me know if you need further help.

Best Regards