Facebook disabled accounts that don't follow the Facebook Terms.
Some examples include:
To help ensure IDs used for identity confirmation are real, they use both manual review and automated systems. This helps detect and prevent risks such as impersonation or ID theft, keeping you and our Facebook community safe.
To help improve the systems for detecting fake IDs and related abuse, they may securely store your ID for up to 1 year. They’ll let you know at the time if we do this, and you can change this at any time in your Identity Confirmation Settings.
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Tap on three lines button to access your Support Inbox
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Tap the Your Violations menu
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Open the message about taking your content down and tap on Request Review
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Once you request a review, your content will be reviewed again by Facebook, usually within 24 hours.
If the reviewers find they've made a mistake, you’ll be informed, and your post, photo or video will be restored.
If you request a review and still don’t agree with the decision, you may be able to appeal to the Oversight Board.
* Note that one can only appeal to the Oversight Board if Facebook has taken down content and that decision has already been appealed by requesting a review that was upheld to be a violation of the Community Standards.
If your Facebook content decision is eligible for review by the Oversight Board, you'll see an Oversight Board Reference ID within your Support Inbox.