Can't seem to find this anywhere in the documentation, but I'm having problems figuring out where my project administrators are supposed to go to actually edit workflows.
I have triple-checked that the "Edit workflows" permission is granted to the "Administrators" project role, and all the workflows are exclusive to this one JSM project.

None of them can see "Edit workflow" under the Actions column when they go to Project settings > Request management > Workflows. Same with Project settings > Request management > Issue types. They also can't edit screens which are also all exclusive to this project.
I also enabled the new workflow editor as the default editor, just in case.
Is this feature only available in Jira Software? Where have I gone wrong?