Do any of the following:
Tap an instance of marked text, then tap Accept or Reject.
Turn off Change Tracking. A dialog asks if you want to accept or reject all changes.
If you reject all changes, the text reverts to the state of the document before you started tracking.
If you send your document to someone else and they open it in Pages on their iPhone or iPad, the document opens in Final View (with change tracking hidden). To see additions and deletions, they must tap Use VoiceOver to preview comments and track changes in Pages on iPad