Thanks.
So If i want a secure encryption, I need a long password for my second user.
There are an app like SnooperStopper (old) for GrapheneOS ?
SnooperStopper allows you to have different device encryption password than screen unlock pattern/PIN/password. You can have strong device encryption password (which you only need to enter once after booting your device) but simple pattern/PIN/password for unlocking your screen.