Hello DaddyRich65,
Apple Support Communities is a great place for help with Focus, and we’re glad you were directed here from the Use Focus on your iPhone, iPad, or iPod touch article.
It sounds as though you would like an automated reply sent to individuals who text you while you’re driving. That feature is still available in Focus, and can be adjusted by going in to Settings > Focus > Driving. If you tap on Auto-Reply, you’ll be able to choose if you want the reply to be sent to all or certain contacts. You’ll also be able to customize the auto-reply that is sent. You can also find additional information about Focus in the following article.
Set up Focus on iPhone
Take care!