How to configure authentication module für angular-based portal?!

Hello,

We are currently running the first steps in version 9.1.1.
We also want to see what steps are necessary to get the new portal based on Angular up and running.

In the documentation (support.oneidentity.com/.../2 the point "Configuring authentication" is explained.

But I can't find this point in the admin portal neither at imx nor at portal.
For example, in one environment we want to have single sign-on - in another we do not. Where is this to be set?
Presumably there is still something to configure for Angular-Web?!
In the previous WebDesigner portal you could adjust the setting you were looking for via Web.config - is there something similar for Angular?
How to proceed with this?

Thanks a lot for any hints on this matter!