That's actually the old method for iPhone 7 and before. Now, you can activate emergency SOS by holding the power button and one of the volume buttons. Assuming you don't need to contact any emergency contacts or services, just cancel out of that and your passcode will be required to unlock.

https://support.apple.com/en-us/HT208076

Try: Hold "volume up" and "power" for 2 seconds

You'll feel a vibration, and biometric login will be disabled until you enter your passcode.

That did the trick thanks. But ultimately I’m behind on updates so my phone could probably be broken into trivial with the forensic tools available to most law enforcement. I’m going to update soon.