Yeah, if you use a relatively new device. Or you make sure your device is encrypted.
Big chunk of old android phones (pre 2016) came unencrypted by default. They could be encrypted if the user wished/knew how.
I remember having a motorola (moto g4 I think) that after flashing twrp it didn't ever asked for my pin. It was officially supported by LineageOS for a long time too. Still, damn fine phone lol