In Android ≥12 and iphone ≥8, pressing 5 times the power button calls the emergency services e.g. 112, 911 ( https://techdiy.info/sports/what-happens-if-you-press-power-button-5-times/ ).
Personally my threat model is losing the phone (or getting stolen) and it falling into wrong hands. High profile analysts (criminals, or police) will figure out it’s SFOS and crack the encryption following our own instructions:
The solution is either to use a very complex lock code, which is impractical for the daily usage (or use the fingerprint in parallel but that also goes against strong security), or implementing a /home encryption using a password different than the simpler lock pin (as proposed by @rinigus GitHub - sailfishos-open/sailfish-device-encryption-community: Support for device storage encryption ).