Not OP but I found these at least, googling in 30 seconds:

Australian Border Force searched phones of 10,000 travellers in past two years, data shows

https://www.theguardian.com/australia-news/article/2024/jun/...

Canadian authorities, like U.S. authorities, say they will seize a phone if a traveler refuses to unlock it. New Zealand imposes a $5,000 fine for failing to unlock a phone, and Britain considers refusing to unlock a phone for police to be a counterterrorism offense.

https://reason.com/2025/04/04/what-to-do-if-border-police-as...