How to instantly wipe an Android phone in case of arrest?

A a Belarusian friend asked me this, but I can't find anything on my own. The common pattern in Belarus is once you are arrested, you are beaten until you give up the pin code. So, if they could give a pin code that would immediately trigger phone reset to factory settings or show a dummy profile, without Telegram and its opposition channels and groups, that would at least protect their family and contacts. It would be nice to the phone to be usable afterwords. Protesters may be given their belongings back after detention, and having a working phone is an advantage if they land in a hospital or just outside the detention center with none to pick them up. So far I suspect that to have this functionality one has to fork Android or LineageOS. Why Android? Because back in Belarus, iPhone is much less popular than in the US or EU.