Problems with PostgreSQL uninstallation

I decided to let go of postgreSQL today and ran the uninstaller as well as deleted rm /etc/postgres-reg.ini that the uninstaller says you have to remove manually. Now I cannot remember what **the other file to remove manually** was. Furthermore I read online that one should **rm -rf /Library/PostgreSQL** but I seem to not have that folder on my MacBook Pro (Monterey 12.2.1). The third and last problem is that I have a postgres folder in /Users/postgres that **is not found in Users and Groups** (neither on login window) in system settings and **I cannot use rm -rf /Users/postgres either**, so I am lost on how to handle that.