First, work out which situation you are in
If you received a notification, an in-app label, or a lockout screen, you are in the enforcement system and a real appeal path exists. If nothing arrived and your posts are simply hard to find, you are probably in the silent filtering layer, which has no dedicated form.
That distinction saves wasted effort: submitting an enforcement appeal for a quiet filter typically returns an automated reply, because no case exists on their side to review.
The appeal paths that do exist
For enforcement actions the app walks you through it: the notification itself, then Settings and privacy, then Your account, then the appeal entry. Adding context and waiting for the automated decision to be re-reviewed is the documented route.
For reach problems with no notification, the honest answer is that there is no appeal. What exists instead is behaviour change plus time — and, for anything you believe is a platform bug, the general support form.
What actually helps
Re-read the last two weeks before doing anything. Delete posts that plausibly triggered a filter, stop the automation, stop bulk follows and unfollows, then use the account like a human for several days. Most reported resolutions happen after the triggering pattern stops, not after a message is sent.
If the account carries your business, say it out loud to your audience. Followers over-index on helping accounts they already like, and that engagement is worth more than a form reply.
What does not help
Paid shadowban-removal services, mass-deleting your history, unfollowing hundreds of accounts in an hour, reposting identical text into many threads, and sending repeated appeals. Each of those either does nothing or re-triggers the filter.
Also ignore anyone quoting an exact duration or promising a fix. No third party has a channel into X internal systems, and the only public source of truth for rules and enforcement steps is X itself.