Completely Removing PostgreSQL

[Amn Ojee Uw <amnojeeuw@xxxxxxxxx>]

In my Debian 12, I have removed the following apps from my system by using the following commands:

sudo apt-get –purge remove postgresql postgresql-15 postgresql-client-common postgresql-common postgresql-contrib
sudo apt-get –purge remove postgresql postgresql-12 postgresql-client-common postgresql-common postgresql-contrib

and then used sudo apt autoremove to remove whatever was left dangling there. However, after using dpkg -l | grep postgres command, I get this?

dpkg -l | grep postgres
rc  postgresql-12                           12.15-1.pgdg120+1                  amd64        The World's Most Advanced Open Source Relational Database
rc  postgresql-15                           15.3-1.pgdg120+1                   amd64        The World's Most Advanced Open Source Relational Database
rc  postgresql-client-common                250.pgdg120+1                      all          manager for multiple PostgreSQL client versions
rc  postgresql-common                       250.pgdg120+1                      all          PostgreSQL database-cluster manager
rc  postgresql-pljava-common                1.6.4-2.pgdg120+1                  all          Java procedural language for PostgreSQL, config files

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The above clearly shows that dpkg, and therefore my Debian 12, still recognize the existence of these packages. When trying to remove them apt remove, it fails to find them.

How can I completely remove PostgreSQL-xx.xx from my system?

Thanks!