I installed pipx with “zypper install python311-pipx”.

But I can’t find a way to install the damn tkcalendar with it -> https://pypi.org/project/tkcalendar/#files

Feeling like an idiot here.

This really cant be that hard…

Yes:

Note: Dependent package 'babel' contains 1 apps
  - pybabel

No apps associated with package tkcalendar. Try again with '--include-deps' to include apps of dependent packages, which are listed above. If you are attempting to install a library, pipx
should not be used. Consider using pip or a similar tool instead.

Ich werde bei dem Thema langsam nur noch sauer. Mit der scheiße wird Kindesmissbrauch nicht weniger sondern alle werden gegängelt…