If I plug up a J5 Create docking station to connect 2 external display I am not seeing the Arrangement open where I can select not to mirror the screens.

Hello ArminM91,

Thanks for reaching out to Apple Support Communities. We understand that you are using 2 external displays but can not see the arrangement option in the display settings on your Mac. Do you see the option if only one of the displays is plugged in?

We suggest you try the following troubleshooting steps, testing after each step:

1. Unplug your displays and restart your Mac.
2. Follow the steps in the section titled Check Connections, in this article: Get help with video issues on external displays connected to your Mac.
3. Verify your software is up to date. How to update the software on your Mac.
4. Boot into another user account and try again. If you don't have another user account, you can create one for testing purposes. Set up users, guests, and groups on Mac.
5. Reset NVRAM or PRAM on your Mac. When your Mac finishes starting up, you might want to open System Preferences and adjust any settings that were reset, such as sound volume, display resolution, startup disk selection, or time zone.

We hope this helps!

Cheers!