Hi there DamianMan,
We understand you have a question about auto-reply with the Driving Focus in iOS 15.
Check out the section below from Use the Driving Focus on your iPhone to concentrate on the road:
"Turn on Auto-Reply
With Auto-Reply, favorites and those you allow notifications from will get an auto reply when you have Driving turned on. They can choose to notify you anyway by sending "urgent" as an additional message. Here's how:
- Go to Settings > Focus and tap Driving.
- Tap Auto-Reply under Options.
- Select an option, like No One, Recents, Favorites, or All Contacts.
From here, you can also customize the auto-reply message that people get when they message you while a Driving Focus is turned on."
We hope this helps.