You basically want to add that user to the admin group. The easiest way to do this is to check the "allow user to administer this computer" box in the accounts pane under System Preferences.

In Linux systems, including Debian 12, the sudo group grants users the ability to execute administrative commands. This provides them with the privileges to install, update, and delete software, ...

Once you install Debian to function as a server, you might notice it's missing something important--sudo. Jack Wallen walks you through the process of installing sudo and enabling it for user. Debian ...