FACEBOOK ADS MANAGER · FREQUENTLY ASKED QUESTIONS
Can I connect a second Meta account?
Not at the same time. A workspace holds one Meta login, but that login can bring in many ad accounts.
Not alongside the first. A workspace holds one Meta login at a time. Trying to connect another shows a message naming who is already connected.
Usually you do not need a second login. One Meta login can share many ad accounts, including client accounts, and you import the extra ones from Add more ad accounts in Settings.
If the ad accounts you need live under a different Meta login, the workspace has to disconnect the current one first, which deletes the imported data. See What happens when I disconnect Meta?