Yep, push hard on the Home button and Siri will start; hover lightly on the Home button and your fingerprint will get read and could trigger Apple Pay.
I'm not sure what you mean "shut out" of iPhone. Does the phone shut off, the screen go black? But you are still on Google Maps?? Try restarting the iPhone (hold the side or top button—depends on your model—until the Apple logo appears). If you can't restart this way hold down the Home button AND side/top until the phone restarts.
What phone model and operating system (iOS) are you using?
On a Mac since 1984.
Currently: 24" M1 iMac, M2 Pro Mac mini with 27" BenQ monitor, M2 Macbook Air, MacOS 14.x; iPhones, iPods (yes, still) and iPads.
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