I want to have an auto message sent when someone texts “I’m away until….”

Unfortunately, neither SMS nor most messaging apps – including iMessage – allow you to send automated texts.

There may be a workaround for what you are trying to accomplish and that is with the use of the Driving Focus Mode. Go to Settings ➡️ Focus ➡️ Driving ➡️ Auto Reply: Set activate to Manually. Auto-Reply to All Contacts. And finally Auto-Reply where you can customize your auto response.

You can manually activate this Driving Focus manually as you need it so that an Auto Response can be sent.

Axel F.