A decade ago, #AmnestyInternational did some extensive UX work on #panic buttons using the power button. They used 10 presses as their trigger, and still got far too many false positives. Their conclusion was power button triggers were not workable. #GuardianProject reached a similar conclusion back then. I guess #Google missed that research: they shipped #Android with a 5-press trigger, and now emergency services numbers are receiving record numbers of false calls:

https://arstechnica.com/gadgets/2023/06/uk-police-blame-android-for-record-number-of-false-emergency-calls/