Seems like this ticket wasn't updated with the latest information. Apologies!

Adding placeholder links IS supported in the new editor.

• Community post
• Product documentation

💡 After you add the [new page name]() info to the page, don't forget to press Enter or return on your keyboard to create the link.

Thank you!
Traci Wilbanks

As we're working through this feature and others, we wanted to address a lot of your concerns as to the future of the new editor and legacy editor.

Please read our recent community post here: https://community.atlassian.com/t5/Confluence-Cloud-articles/Change-to-your-content-is-in-your-hands/ba-p/1324476

Thanks,
Avinoam