LineageOS always on display

You can go to settings then display, then hit the drop down arrow for advance and go to ambient display and turn off the always on option .

Turn your power on or off

One of the many features of the Pixel 6/6 Pro is an always-on display . When the feature is off, turning off the display does precisely that — turn off the entire display. However, enabling the always-on mode will still show some important info even when the screen is technically ‘off.5 Ara 2021