We don't support that out of the box as Joomla doesn't support it. Since we only add social authentications, it doesn't make sense for our registration to have a T&C box when the standard Joomla registration flow doesn't.
With that said, we do support T&C boxes in JomSocial, EasySocial and some other extensions that we integrate with.
I hope that helps explain, but if you need any more details, please let us know.
Thanks,
Alex