Parents should stay calm. They can quickly stop the story if it's inappropriate for the child's age and then divert the child's attention to something else, like a favorite toy or a fun activity.
Honestly, no one knows for now. Usually, such decisions are made by the production team and announced when they are ready. Just stay tuned for the latest news.
I have no clear information on when the One Piece manga will continue. It could be influenced by many things. Maybe check the official manga website or social media accounts for any hints or announcements.