Custom TINYMCE using FORGE - Jira description field?

How can I extend the Rich Text Editor used in JIRA description with Forge?
I can not find any equivalent of this article for Forge. What would be the right approach?

https://developer.atlassian.com/server/jira/platform/customizing-the-tinymce-within-rich-text-editor-in-jira/

Thx

Welcome to the Atlassian developer community @StephaneDehousse,

There are quite a few differences between Server & Cloud in regard to the editor. First, the underlying format of rich text fields is completely different. For Jira Cloud, the format is Atlassian Document Format, for which TinyMCE would not work. Second, the editor is Atlassian-built code. The net result is there isn’t any documented and supported way to extend the rich text editor in Jira Cloud, with or without Forge.