Automatically declining calls when connected to CarPlay

See this Apple Support Article and turn off the Driving Focus on your iPhone --> Stay focused while driving with iPhone - Apple Support

iihabibaii wrote:

When connected to Apple CarPlay wired it will automatically decline incoming calls

The current stable release of iOS including bug fixes, security updates is iOS 17.5.1

Update your iPhone or iPad - Apple Support

you can file a bug report /submit your Apple Feedback here: Product Feedback - Apple