@Angela , Welcome to the Atlassian Community!
Are you using project Team-Managed or Company-Managed?
Because , if you´re using Company-Managed project, the step by step published on link that you shared it´s functional still.
Go to Project Settings > Go to Workflows > Click on "Add workflow" > Look for your workflow and select > select the issuetype where your workflow will be used > Clique on "Finish" and "Publish".
This step by step works to Company Managed Projects.
Can you confirm what template you´re using in your project? (team managed or company managed)
Hi @Angela ! Welcome to the Atlassian Community!
If you created a Team-managed project (the article you linked called them next-gen projects), you cannot assign specific workflows to it. Assigning workflows through the use of workflow schemes can only be done on company-managed projects.
👋 Hi there Jira Community! A few months ago we shared with you plans around renaming epics in your company-managed projects. As part of these changes, we highlighted upcoming changes to epics on...
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