Right, but if a young child is unaware of this and they reach out for help on a monitored platform they’re gonna find themselves in an even worse situation.

The challenge there is that in situations with abusive parents the kid is in even more danger.

Microsoft’s Exchange Online Plan 1 is email-only and is 4/month per user. There are probably cheaper IMAP providers, but EO1 is full exchange: mail, global address book, calendars, etc.