Max Nikulin wrote on 03/10/2023 12:11:
apt list '?narrow(~i, !~Astable|~Astable-backports|!~O^Debian$|~o|~c)'
In my experience the only tool that gives correct answers, is apt-show-versions in the package of the same name:
$ apt-show-versions | grep -v '/stable 'Beware, that it works with a database which should be updated before asking something.
Regards, Jörg.