Debian 11 (or even 10?) official support? What is current Linux on-premise supported distros?

Busy with tracking everything that is going wrong now I’m trying to install on Debian 11, but notice that even Debian 10 isn’t supported according to the documentation: What is the current officially current (ie. stable, not old-stable/archived)  supported Linux distributions and versions – if any for on-premise deployments? Or are we “forced” to rather go the container route in future?  
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