Just to make it explicit: people who stay on Android 11 will not be able to install the bi-monthly security updates over-the-air (OTA) but have to use the manual installation method.
Which means for people who haven’t updated to A13 yet (and reverted back to A11 the way described above) and simply stayed on A11 for now, they’ll have to unlock the bootloader (and wipe their data in the process) to install the updates, right?
Update: A11 updates can be installed via sideload without wiping the data 