The trick around that is to use some form of oblivious block storage. That would completely remove those traces, though it is very performance intensive to anything obliviously.

However, that would clearly make your phone look suspicious from forensic analysis. To counteract that, you have two hidden volumes leaving you with three total systems: your insecure system (first password), the honeypot volume for “clever” actors to find, and then the truly secure volume.

I think one honeypot would be ideal. It needs to be convincing and have data that seems sensitive which would take a lot of effort. Put your nude photos there or something.