Thank you for your feedback on adding page anchors into the new editor. We currently have link to headings that are natively supported in the new editor without the need for the old Anchor Macro. You can directly reference headers by copying the link upon hover or by adding #Header-Name to the URL of your page. With our originally announced plan to clean up macros (https://confluence.atlassian.com/confcloud/we-re-cleaning-up-our-macros-946028471.html) and our implementation of link to headings, we currently have no plans in the near term to bring back the Anchor Macro in its original state.
You can track our upcoming roadmap here: https://confluence.atlassian.com/confcloud/confluence-cloud-editor-roadmap-967314556.html. If we have any updated plans, we will update the thread here. Thank you again for your feedback.