In Arbor, you can see whether an email or SMS has been delivered, sent or failed. You can see how this works here: Viewing sent, received and failed communications and sending follow-ups
If you use In-App Messages, you can monitor whether the message has read by the guardian. You can see how this works here.
It isn't possible to have a 'read' indicator for emails and texts, to confirm whether someone has read the message. This is because recipient inboxes can only send us confirmation that the communications have left our side and arrived at the intended recipient.
This is just like any other normal email or SMS messaging service - you can’t see when you send an email to a friend whether they’ve read it or not.