With an unlocked BL, flash an ARM64 AB GSI within fastbootd, format userdata from recovery, reboot, profit. vbmeta should only be needed if you do Magisk.
Google GSIs simply boot; PHH-based ones (which are ones people will actually want to use) don't boot just yet, but was just fixed thanks to @phhusson (see here), and will be in GSIs updated afterwards.
Google GSIs simply boot; PHH-based ones (which are ones people will actually want to use) don't boot just yet, but was just fixed thanks to @phhusson (see here), and will be in GSIs updated afterwards.