encryption – Is the data on flash memory plain or encrypted?

I understand there was full disk encryption from Android 5.5 to 9. Not sure it was ever the default, and not sure what the default is now. I’ve bricked a Pixel 3 running Android 11, and I want to know whether something crazy like this flashfixers.com/recover-data-dead-phone-chip-off-data-recovery could recover the data.

I’ve tried everything else. The device is stuck in a freezing boot loop. I can make it to recovery mode, but sideloading an update through adb doesn’t fix it, and I can’t use adb to pull data nor fastboot to load TWRP, because I never unlocked the bootloader. Not ever sure unlocking was possible, because it’s been on a Verizon payment plan.