Thank you for sharing your feedback and for engaging with our roadmap. This has now been shared with the product team. Your feedback helps shape our future updates, so please continue to share your ideas and vote on others that matter to you.

I also find this really frustrating, it would be much better to have the option to tick/untick a contact for a child

Sometimes we need to send messages to only P2 contact, unfortunately the system only allows you to send to P1, or both P1 & P2, with no option for just P2. Hopefully this will be an option in the near future.