I guess you talk about next-gen projects. Features in next-gen projects are quite different from classic projects.
In next-gen project you manage workflows by adding columns in the next-gen board. You can not add more rules than already available.
If you want more flexibility you should move to classic projects.
Hi All! We’re excited to share the launch of an announcement banner that lets Jira site administrators communicate directly to their users across their Jira Cloud instance. ...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events