The 6 checks

1
Use a computer, not the phone app

The mobile app doesn't show the full settings menu. Go to business.facebook.com in a desktop browser.

2
Log in with your personal Facebook account

Facebook is always the primary login. Use "Continue with Instagram" only as a last resort, and only with your business Instagram.

3
Check you're in the right Business Portfolio

Most accounts have several. Click your name top-left, then compare asset counts: "0 business assets" is empty, and the right one shows your real Page.

4
Check your access level

Partial access only shows the specific Pages or ad accounts someone assigned to you. If a Page is missing, you may not have been assigned it.

5
Check Instagram is linked to the right Page

An Instagram account can be linked to one Facebook Page at a time, and it must be a Business or Creator account.

6
Check for a restriction

If your Page, ad account or portfolio shows a restriction or "disabled" notice, use Meta's own troubleshooting page for disabled or restricted accounts.

Which one is it?
Page missing
Checks 3 and 4: wrong portfolio, or the Page was never assigned to you.
Instagram won't connect
Check 5, then the Instagram connection guide.
Locked out
Check 2, then the lost Page access guide.
Restricted / disabled
Check 6, then disabled vs restricted.
Don't: create a new portfolio or new account to "start fresh." It usually makes the access problem worse. See why a new account usually gets linked back.