TBH, in order to be forced to unlock your phone under duress, you’d have to be a pretty high profile target.
Why, that can happen to anyone at the airport when entering the USA, UK, Australia, etc. Or if you have been in a car accident, your cell phone will be confiscated in Germany, for example. Or when you were forced to unlock the phones and banking apps at gunpoint: https://www.cbsnews.com/chicago/news/robbers-unlock-phones-banking-apps-gunpoint-bucktown-chicago/
The people Interpool is after don’t need Duress. They simply refuse to give out their password. Current Pixel and iPhones phones cannt be cracked with forensic tools. https://discuss.grapheneos.org/d/12848-claims-made-by-forensics-companies-their-capabilities-and-how-grapheneos-fares