From your picture, it seems that you are using a next-gen project instead of a classic project.
Currently, on Jira it is not possible to manage workflows while using next-gen projects, however, they are already working on something related to it and you can check their track on the ticket below:
The idea behind next-gen projects is to empower the project owners themselves to customize their projects based on their unique needs without bothering a Jira admin to help them. They can easily add or remove fields to their issue types, set up some interesting automated rules and more.
That being said, with next-gen projects you create columns directly on the board, instead of managing workflows. In case you would like to create a customizable workflow, the best approach would be to create a classic project where you are going to be able to create and customize your own workflow.
To check how to work with your workflow you can check the documentation below:
Hope it helps, Adriana.
Have a nice day!
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